Changes in version 2.0.22-stable (5 Jan 2015)

SECURITY FIXES (evbuffers)
 o Avoid integer overflow bugs in evbuffer_add() and related functions.  See CVE-2014-6272 advisory for more information. (20d6d4458bee5d88bda1511c225c25b2d3198d6c)

BUGFIXES (evhttp)
 o fix #73 and fix http_connection_fail_test to catch it (crash fix) (b618204 Greg Hazel)
 o Avoid racy bufferevent activation (5eb1788 Nate Rosenblum)

BUGFIXES (compilation and portability)
 o Fix compilation with WIN32_HAVE_CONDITION_VARIABLES enabled (7e45739)
 o Fix missing AC_PROG_SED on older Autoconfs (9ab2b3f Tay Ray Chuan)
 o Backport libevent to vanilla Autoconf 2.59 (as used in RHEL5) (74d4c44 Kevin Bowling)
 o Use AC_CONFIG_HEADERS in place of AM_CONFIG_HEADERS for autmake 1.13 compat (817ea36)
 o Rename configure.in to configure.ac to appease newer autoconfs (0c79787)
 o Avoid using top_srcdir in TESTS: new automakes do not like this (a55514e)
 o Use windows vsnprintf fixup logic on all windows environments (e826f19)
 o Fix a compiler warning when checking for arc4random_buf linker breakage. (5cb3865)
 o Fix another arc4random_buf-related warning (e64a2b0)
 o Add -Qunused-arguments for clang on macos (b56611d Trond Norbye)

BUGFIXES (resource leaks/lock errors on error)
 o Avoid leaking fds on evconnlistener with no callback set (69db261)
 o Avoid double-close on getsockname error in evutil_ersatz_socketpair (0a822a6)
 o Fix a locking error in bufferevent_socket_get_dns_error. (0a5eb2e)
 o libevent/win32_dealloc() : fix sizeof(pointer) vs sizeof(*pointer) (b8f5980 Frank Denis)

BUGFIXES: (other stability)
 o bufferevent_pair: don't call downcast(NULL) (f2428a2)
 o Consistently check for failure from evbuffer_pullup() (60f8f72)
 o Fix race caused by event_active (3c7d6fc vjpai)

BUGFIXES (miscellaneous)
 o Avoid redundant invocations of init_extension_functions for IOCP (3b77d62)
 o Typo fixes from Linus Nordberg (cec62cb, 8cd695b)
 o Add a few files created by "make verify" to .gitignore. (1a8295a Pierre Phaneuf)
 o regress_buffer: fix 'memcmp' compare size (79800df Maks Naumov)
 o Fix bufferevent setwatermark suspend_read (b34e4ac ufo2243)
 o Fix evbuffer_peek() with len==-1 and start_at non-NULL. (fb7e76a)

BUFGIXES (evdns)
 o Checking request nameserver for NULL, before using it. (5c710c0 Belobrov Andrey)
 o Fix SEGFAULT after evdns_base_resume if no nameservers installed. (f8d7df8 Azat Khuzhin)
 o Fix a crash in evdns related to shutting down evdns (9f39c88,e8fe749)

BUGFIXES (epoll)
 o Check does arch have the epoll_create and __NR_epoll_wait syscalls. (dfe1e52 Marcin Juszkiewicz)

BUGFIXES (evutil_secure_random)
 o Avoid other RNG initialization FS reads when urandom file is specified (9695e9c, bb52471)
 o When we seed from /proc/sys/kernel/random/uuid, count it as success (e35b540)
 o Document that arc4random is not a great cryptographic PRNG. (6e49696)
 o Add evutil_secure_rng_set_urandom_device_file (2bbb5d7)
 o Really remove RNG seeds from the stack (f5ced88)


DOCUMENTATION FIXES
 o Fix a mistake in evbuffer_remove() arguments in example http server code (c322c20 Gyepi Sam)
 o Fix a typo in a comment in buffer.h. Spotted by Alt_F4 (773b0a5)
 o Clarify event_base_loop exit conditions (031a803)
 o Use FindClose for handle from FindFirstFile in http-server.c (6466e88)
 o Fix a typo in a doxygen comment. Reported by 亦得. (be1aeff)


Changes in version 2.0.21-stable (18 Nov 2012)
BUGFIXES:
 o ssl: Don't discard SSL read event when timeout and read come close together (576b29f)
 o ssl: Stop looping in "consider_reading" if reading is suspended. (f719b8a Joachim Bauch)
 o ssl: No need to reserve space if reading is suspended. (1acf2eb Joachim Bauch)
 o dns: Avoid a memory-leak on OOM in evdns. (73e85dd, f2bff75 George Danchev)
 o build: Use python2 rather than python (0eb0109 Ross Lagerwall)
 o build: Compile without warnings on mingw64 (94866c2)
 o build: Fix compilation on mingw64 with -DUSE_DEBUG (62bd2c4)
 o build: Make rpcgen_wrapper.sh work on systems without a "python2" binary (f3009e4)
 o iocp: Close IOCP listener socket on free when LEV_OPT_CLOSE_ON_FREE is set (cb853ea Juan Pablo Fernandez)
 o core: Avoid crash when event_pending() called with no event_base set on event (e3cccf3)
 o misc: remove stray 'x' so print_err will compile when uncommented (ac35650 Patrick Pelletier)
 o tests: Fix renegotiation test to work around openssl 1.0.1 bug (c2f3086)
 o tests: Warn when openssl version in unit test mismatches compiled version. (ac009f9)


Changes in version 2.0.20-stable (23 Aug 2012)
BUGFIXES:
 o core: Make event_pending() threadsafe. (be7a95c Simon Liu)
 o win32: avoid crash when waiting forever on zero fds. (160e58b)
 o evhttp: Fix a memory leak on error in evhttp_uriencode (11c8b31)
 o evbuffer: Avoid possible needless call to writev. Found by coverity. (6a4ec5c)
 o evdns: memset sockaddr_in before using it. Found by coverity. (a1a0e67)
 o evhttp: Check more setsockopt return values when binding sockets. Found by coverity (a0912e3)
 o evdns: Avoid segfault on weird timeout during name lookup. (dc32077 Greg Hazel)
 o bufferevent_ssl: Correctly invoke callbacks when a SSL bufferevent reads some and then blocks. (606ac43)


PORTABILITY FIXES:
 o check for arc4random_buf at runtime, on OS X (bff5f94 Greg Hazel)
 o Correctly check for arc4random_buf (fcec3e8 Sebastian Hahn)
 o Add explicit AC_PROG_SED to configure.in so all autoconfs will expose $(SED) (ca80ea6)

BUILD FIXES:
 o Add GCC annotations so that the vsprintf functions get checked properly (117e327)
 o Fix an unused variable warning on *BSD. (c0720c1)

UNIT TEST FIXES:
 o Fix a couple of memory leaks (found with Valgrind). (3b2529a Ross Lagerwall)
 o Remove deadcode in http regression tests. Found by coverity. (5553346)
 o Fix possible uninitialized read in dns regression tests. Found by coverity. (2259777)
 o Set umask before calling mkstemp in unit tests. Found by coverity (f1ce15d)
 o Fix various check-after-dereference issues in unit tests: found by coverity (4f3732d)
 o Fix resource leaks in the unit tests; found by coverity (270f279)
 o Add some missing null checks to unit tests; found by coverity (f021c3d)
 o Avoid more crashes/bad calls in unit tests; found by coverity (3cde5bf)
 o Remove unused variable; spotted by coverity (6355b2a)
 o Add checks to various return values in unit tests. Found by coverity (b9e7329)
 o Move assignment outside tt_assert in ssl unit tests. Appeases coverity. (a2006c0)



Changes in version 2.0.19-stable (3 May 2012)
BUGFIXES (CORE):
 o Refactor event_persist_closure: raise and extract some common logic (bec22b4)
 o If time has jumped so we'd reschedule a periodic event in the past, schedule it for the future instead (dfd808c)
 o If a higher-priority event becomes active, don't continue running events of the current priority. (2bfda40)

BUGFIXES (SSL):
 o Fixed potential double-readcb execution with openssl bufferevents. (4e62cd1 Mark Ellzey)

BUGFIXES (DNS):
 o Cancel a probe request when the server is freed, and ignore cancelled probe callbacks (94d2336 Greg Hazel)
 o Remove redundant DNS_ERR_CANCEL check, move comment (46b8060 Greg Hazel)
 o When retransmitting a timed-out DNS request, pick a fresh nameserver. (3d9e52a)

DOCUMENTATION FIXES:
 o Fix a typo in the bufferevent documentation (98e9119)
 o Add missing ) to changelog; spotted by rransom (4c7ee6b)
 o Fix the website URL in the readme (f775521)

COMPILATION FIXES:
 o Fix a compilation error with MSVC 2005 due to use of mode_t (336dcae)
 o Configure with gcc older than 2.95 (4a6fd43 Sebastian Hahn)
 o Generate event-config.h with a single sed script (30b6f88 Zack Weinberg)

FORWARD-COMPATIBILITY:
 o Backport: provide EVENT_LOG_* names, and deprecate _EVENT_LOG_* (d1a03b2)

TESTING/DEBUGGING SUPPORT:
 o dns-example.c can now take a resolv.conf file on the commandline (6610fa5)
 o Make some evdns.c debug logs more verbose (d873d67)
 o Work-around a stupid gcov-breaking bug in OSX 10.6 (b3887cd)



Changes in version 2.0.18-stable (22 Mar 2012)
BUGFIXES (core):
 o Make uses of open() close-on-exec safe by introducing an internal evutil_open_closeonexec. (d2b5f72 Ross Lagerwall, 03dce42)

BUGFIXES (kqueue):
 o Properly zero the kevent in kq_setup_kevent() (c2c7b39 Sebastian Hahn)

BUILD FIXES:
 o Added OPENSSL_LDFLAGS env variable which is appended to SSL checks. (9278196 Mark Ellzey)
 o Changed OPENSSL_LDFLAGS to OPENSSL_LIBADD (2d67b63 Mark Ellzey)
 o Don't do clang version detection when disabling some flags (083296b Sebastian Hahn)

BUGFIXES (dns):
 o Stop crashing in evdns when nameserver probes give a weird error (bec5068)


Changes in version 2.0.17-stable (10 Feb 2012)

BUGFIXES (core):
 o Be absolutely sure to clear pncalls before leaving event_signal_closure (11f36a5)
 o check for sysctl before we use it (358c745 Mike Frysinger)
 o Remove bogus casts of socket to int before calling ev_callback (f032516)
 o Make evconnlistener work around bug in older Linux when getting nmapped (ecfc720)
 o Fix a list corruption bug when using event_reinit() with signals present (6e41cdc)
 o Fix a fd leak in event_reinit() (3f18ad1)
 o Do a memberwise comparison of threading function tables (c94a5f2 Nate R)
 o Use C-style comments in C source files (for compatibility with compilers such as xlc on AIX). (d84d917 Greg Hewgill)
 o Avoid crash when freeing event_iocp and using event_set_mem_functions (19715a6)
 o In the kqueue backend, do not report EBADF as an EV_READ (5d7bfa1 Nicholas Marriott)

BUGFIXES (evbuffer and bufferevents):
 o Fix behavior of evbuffer_peek(buf,-1,NULL,NULL,0) (c986f23 Zack Weinberg)
 o Loop on filtering SSL reads until we are blocked or exhausted. (5b4b812)

BUGFIXES (evhttp):
 o Force strict validation of HTTP version in response. (790f6b3 Catalin Patulea)

BUGFIXES (evdns):
 o evdns: fix a bug in circular-queue implementation (d6094b1)

BUILD FIXES:
 o Fix a silly compilation error with the sun compiler (1927776 Colin Watt)
 o Suppress a gcc warning from ignoring fwrite return in http-sample.c (7206e8c)

DOCUMENTATION FIXES:
 o Slightly clarify evbuffer_peek documentation (7bbf6ca)
 o Update copyright notices to 2012 (e49e289)

NEW APIS:
 o Backport evhttp_connection_get_bufferevent to Libevent 2.0 (da70fa7 Arno Bakker)

TESTS AND TEST FIXES:
 o Fix a race condition in the dns/bufferevent_connect_hostname test. (cba48c7)
 o Add function to check referential integrity of an event_base (27737d5)
 o Check event_base correctness at end of each unit test (3312b02)
 o Workaround in the unit tests for an apparent epoll bug in Linux 3.2 (dab9187)
 o Better workaround for Linux 3.2 edge-triggered epoll bug (9f9e259)

Changes in version 2.0.16-stable (18 Nov 2011)
BUGFIXES (core):
 o More detailed message in case of libevent self-debugging failure. (9e6a4ef Leonid Evdokimov)
 o epoll: close fd on alloc fail at initialization (1aee718 Jamie Iles)
 o Fix compile warning from saying event2/*.h inside a comment (447b0ba)
 o Warn when unable to construct base because of failing make_base_notifiable (4e797f3)
 o Don't try to make notifiable event_base when no threading fns are configured (e787413)

BUGFIXES (evbuffer):
 o unit test for remove_buffer bug (90bd620 Greg Hazel)
 o Fix an evbuffer crash in evbuffer_remove_buffer() (c37069c)

BUGFIXES (bufferevent_openssl):
 o Refactor amount-to-read calculations in buffervent_ssl consider_reading() (a186e73 Mark Ellzey)
 o Move SSL rate-limit enforcement into bytes_to_read() (96c562f)
 o Avoid spinning on OpenSSL reads (2aa036f Mark Ellzey)

BUGFIXES (dns)
 o Empty DNS reply with OK status is another way to say NODATA. (21a08d6 Leonid Evdokimov)

TESTING:
 o Tests for 94fba5b and f72e8f6 (d58c15e Leonid Evdokimov)
 o Test for commit aff6ba1 (f7841bf Leonid Evdokimov)
 o Style and comment tweaks for dns/leak* tests (5e42202)
 o improve test to remove at least one buffer from src (7eb52eb Greg Hazel)

DOCUMENTATION:
 o Add note about evhttp_send_reply_end to its doxygen (724bfb5)
 o Update copyright dates to 2011. (3c824bd)
 o Fix typo in whatsnew-2.0.txt (674bc6a Mansour Moufid)
 o Improve win32 behavior of dns-sample.c code (a3f320e Gisle Vanem)



Changes in version 2.0.15-stable (12 Oct 2011)
BUGFIXES (DNS):
 o DNS: add ttl for negative answers using RFC 2308 idea. (f72e8f6 Leonid Evdokimov)
 o Add DNS_ERR_NODATA error code to handle empty replies. (94fba5b Leonid Evdokimov)

BUFGIXES (bufferevents and evbuffers):
 o Make evbuffer callbacks get the right n_added value after evbuffer_add (1ef1f68 Alex)
 o Prefer mmap to sendfile unless a DRAINS_TO_FD flag is set. Allows add_file to work with SSL. (0ba0af9)

BUGFIXES (event loop):
 o When a signal callback is activated to run multiple times, allow event_base_loopbreak to work even before they all have run. (4e8eb6a)

DOCUMENTATION FIXES:
 o Fix docstring in dns.h (2b6eae5 Leonid Evdokimov)
 o refer to non-deprecated evdns functions in comments (ba5c27d Greg Hazel)

BUILD AND TESTING FIXES:
 o le-proxy and regress depend on openssl directly (9ae061a Sergey Avseyev)
 o Use _SOURCES, not _sources, in sample/Makefile.am (7f82382)
 o Fixed compiler warnings for unchecked read/write calls. (c3b62fd Mark Ellzey)
 o Make write-checking fixes use tt_fail_perror (2b76847)
 o Fix some "value never used" warnings with gcc 4.6.1 (39c0cf7)



Changes in version 2.0.14-stable (31 Aug 2011)
BUGFIXES (bufferevents and evbuffers):
 o Propagate errors on the underlying bufferevent to the user. (4a34394 Joachim Bauch)
 o Ignore OpenSSL deprecation warnings on OS X (5d1b255 Sebastian Hahn)
 o Fix handling of group rate limits under 64 bytes of burst (6d5440e)
 o Solaris sendfile: correctly detect amount of data sent (643922e Michael Herf)
 o Make rate limiting work with common_timeout logic (5b18f13)
 o clear read watermark on underlying bufferevent when creating filtering bev to fix potentially failing fragmented ssl handshakes (54f7e61 Joachim Bauch)

BUGFIXES (IOCP):
 o IOCP: don't launch reads or writes on an unconnected socket (495c227)
 o Make IOCP rate-limiting group support stricter and less surprising. (a98da7b)
 o Have test-ratelim.c support IOCP (0ff2c5a)
 o Make overlapped reads result in evbuffer callbacks getting invoked (6acfbdd)
 o Correctly terminate IO on an async bufferevent on bufferevent_free (e6af35d)

BUGFIXES (other):
 o Fix evsig_dealloc memory leak with debugging turned on. (9b724b2 Leonid Evdokimov)
 o Fix request_finished memory leak with debugging turned on. (aff6ba1 Leonid Evdokimov)

BUILD AND TESTING FIXES:
 o Allow OS-neutral builds for platforms where some versions have arc4random_buf (b442302 Mitchell Livingston)
 o Try to fix 'make distcheck' errors when building out-of-tree (04656ea Dave Hart)
 o Clean up some problems identified by Coverity. (7c11e51 Harlan Stenn)


Changes in version 2.0.13-stable (18 Jul 2011)
BUGFIXES
 o Avoid race-condition when initializing global locks (b683cae)
 o Fix bug in SSL bufferevents backed by a bev with a write high-watermarks (e050703 Joachim Bauch)
 o Speed up invoke_callbacks on evbuffers when there are no callbacks (f87f568 Mark Ellzey)
 o Avoid a segfault when all methods are disabled or broken (27ce38b)
 o Fix incorrect results from evbuffer_search_eol(EOL_LF) (4461f1a)
 o Add some missing checks for mm_calloc failures (89d5e09)
 o Replace an assertion for event_base_free(NULL) with a check-and-warn (09fe97d)
 o Report kqueue ebadf, epipe, and eperm as EV_READ events (1fd34ab)
 o Check if the `evhttp_new_object' function in `http.c' returns NULL. (446cc7a Mansour Moufid)
 o Use the correct printf args when formatting size_t (3203f88)
 o Complain if the caller tries to change threading cbs after setting them (cb6ecee)

DOCUMENTATION FIXES AND IMPROVEMENTS
 o Revise the event/evbuffer/bufferevent doxygen for clarity and accuracy (2888fac)
 o Update Doxyfile to produce more useful output (aea0555)

TEST FIXES
 o Fix up test_evutil_snprintf (caf695a)
 o Fix tinytest invocation from windows shell (57def34 Ed Day)

BUILD FIXES
 o Use AM_CPPFLAGS in sample/Makefile.am, not AM_CFLAGS (4a5c82d)
 o Fix select.c compilation on systems with no NFDBITS (49d1136)
 o Fix a few warnings on OpenBSD (8ee9f9c Nicholas Marriott)
 o Don't break when building tests from git without python installed (b031adf)
 o Don't install event_rpcgen.py when --disable-libevent-install is used (e23cda3 Harlan Stenn)
 o Fix AIX build issue with TAILQ_FOREACH definition (e934096)


Changes in version 2.0.12-stable (4 Jun 2011)
BUGFIXES
 o Fix a warn-and-fail bug in kqueue by providing kevent() room to report errors (28317a0)
 o Fix an assert-inducing fencepost bug in the select backend (d90149d)
 o Fix failing http assertion introducd in commit 0d6622e (0848814 Kevin Ko)
 o Fix a bug that prevented us from configuring IPv6 nameservers. (74760f1)
 o Prevent size_t overflow in evhttp_htmlescape. (06c51cd Mansour Moufid)
 o Added several checks for under/overflow conditions in evhttp_handle_chunked_read (a279272 Mark Ellzey)
 o Added overflow checks in evhttp_read_body and evhttp_get_body (84560fc Mark Ellzey)

DOCUMENTATION:
 o Add missing words to EVLOOP_NONBLOCK documentation (9556a7d)

BUILD FIXES
 o libssl depends on libcrypto, not the other way around. (274dd03 Peter Rosin)
 o Libtool brings in the dependencies of libevent_openssl.la automatically (7b819f2 Peter Rosin)
 o Use OPENSSL_LIBS in Makefile.am (292092e Sebastian Hahn)
 o Move the win32 detection in configure.in (ceb03b9 Sebastian Hahn)
 o Correctly detect openssl on windows (6619385 Sebastian Hahn)
 o Fix a compile warning with zlib 1.2.4 and 1.2.5 (5786b91 Sebastian Hahn)
 o Fix compilation with GCC 2, which had no __builtin_expect (09d39a1 Dave Hart)
 o Fix new warnings from GCC 4.6 (06a714f)
 o Link with -lshell32 and -ladvapi32 on Win32. (86090ee Peter Rosin)
 o Make the tests build when OpenSSL is not available. (07c41be Peter Rosin)
 o Bring in the compile script from automake, if needed. (f3c7a4c Peter Rosin)
 o MSVC does not provide S_ISDIR, so provide it manually. (70be7d1 Peter Rosin)
 o unistd.h and sys/time.h might not exist. (fe93022 Peter Rosin)
 o Make sure TINYTEST_LOCAL is defined when building tinytest.c (8fa030c Peter Rosin)
 o Fix winsock2.h #include issues with MSVC (3d768dc Peter Rosin)
 o Use evutil_gettimeofday instead of relying on the system gettimeofday. (0de87fe Peter Rosin)
 o Always use evutil_snprintf, even if OS provides it (d1b2d11 Sebastian Hahn)
 o InitializeCriticalSectionAndSpinCount requires _WIN32_WINNT >= 0x0403. (816115a Peter Rosin)
 o cygwin: make it possible to build DLLs (d54d3fc)



Changes in version 2.0.11-stable (27 Apr 2011)
  [Autogenerated from the Git log, sorted and cleaned by hand.]
BUGFIXES:
 o Fix evport handling of POLLHUP and POLLERR (b42ce4b)
 o Fix compilation on Windows with NDEBUG (cb8059d)
 o Check for POLLERR, POLLHUP and POLLNVAL for Solaris event ports (0144886 Trond Norbye)
 o Detect and handle more allocation failures. (666b096 Jardel Weyrich)
 o Use event_err() only if the failure is truly unrecoverable. (3f8d22a Jardel Weyrich)
 o Handle resize failures in the select backend better. (83e805a)
 o Correctly free selectop fields when select_resize fails in select_init (0c0ec0b)
 o Make --enable-gcc-warnings a no-op if not using gcc (3267703)
 o Fix a type error in our (unused) arc4random_stir() (f736198)
 o Correctly detect and stop non-chunked http requests when the body is too long (63a715e)
 o Have event_base_gettimeofday_cached() always return wall-clock time (a459ef7)
 o Workaround for http crash bug 3078187 (5dc5662 Tomash Brechko)
 o Fix incorrect assertions and possible use-after-free in evrpc_free() (4b8f02f Christophe Fillot)
 o Reset outgoing http connection when read data in idle state. (272823f Tomash Brechko)
 o Fix subtle recursion in evhttp_connection_cb_cleanup(). (218cf19 Tomash Brechko)
 o Fix the case when failed evhttp_make_request() leaved request in the queue. (0d6622e Tomash Brechko)
 o Fix a crash bug in evdns server circular list code (00e91b3)
 o Handle calloc failure in evdns. (Found by Dave Hart) (364291e)
 o Fix a memory leak on win32 socket->event map. (b4f89f0)
 o Add a forgotten NULL check to evhttp_parse_headers (12311ff Sebastian Hahn)
 o Fix possible NULL-deref in evdns_cancel_request (5208544 Sebastian Hahn)

PORTABILITY:
 o Fall back to sscanf if we have no other way to implement strtoll (453317b)
 o Build correctly on platforms without sockaddr_storage (9184563)
 o Try to build correctly on platforms with no IPv6 support (713c254)
 o Build on systems without AI_PASSIVE (cb92113)
 o Fix http unit test on non-windows platforms without getaddrinfo (6092f12)
 o Do not check for gethostbyname_r versions if we have getaddrinfo (c1260b0)
 o Include arpa/inet.h as needed on HPUX (10c834c Harlan Stenn)
 o Include util-internal.h as needed to build on platforms with no sockaddr_storage (bbf5515 Harlan Stenn)
 o Check for getservbyname even if not on win32. (af08a94 Harlan Stenn)
 o Add -D_OSF_SOURCE to fix hpux builds (0b33479 Harlan Stenn)
 o Check for allocation failures in apply_socktype_protocol_hack (637d17a)
 o Fix the check for multicast or broadcast addresses in evutil_check_interfaces (1a21d7b)
 o Avoid a free(NULL) if out-of-memory in evdns_getaddrinfo. Found by Dave Hart (3417f68)

DEFENSIVE PROGRAMMING:
 o Add compile-time check for AF_UNSPEC==PF_UNSPEC (3c8f4e7)

BUGS IN TESTS:
 o Fix test.sh output on solaris (b4f89b6 Dave Hart)
 o Make test-eof fail with a timeout if we never get an eof. (05a2c22 Harlan Stenn)
 o Use %s with printf in test.sh (039b9bd)
 o Add an assert to appease clang's static analyzer (b0ff7eb Sebastian Hahn)
 o Add a forgotten return value check in the unit tests (3819b62 Sebastian Hahn)
 o Actually send NULL request in http_bad_request_test (b693c32 Sebastian Hahn)
 o add some (void) casts for unused variables (65707d7 Sebastian Hahn)
 o Refactor test_getaddrinfo_async_cancel_stress() (48c44a6 Sebastian Hahn)
 o Be nice and "handle" error return values in sample code (4bac793 Sebastian Hahn)
 o Check return value of evbuffer_add_cb in tests (93a1abb Sebastian Hahn)
 o Remote some dead code from dns-example.c (744c745 Sebastian Hahn)
 o Zero a struct sockaddr_in before using it (646f9fe Sebastian Hahn)

BUILD FIXES:
 o Fix warnings about AC_LANG_PROGRAM usage (f663112 Sebastian Hahn)
 o Skip check for zlib if we have no zlib.h (a317c06 Harlan Stenn)
 o Fix autoconf bracket issues; make check for getaddrinfo include netdb.h (833e5e9 Harlan Stenn)
 o Correct an AM_CFLAGS to an AM_CPPFLAGS in test/Makefile.am (9c469db Dave Hart)
 o Fix make distcheck & installation of libevent 1 headers (b5a1f9f Dave Hart)
 o Fix compilation under LLVM/clang with --enable-gcc-warnings (ad9ff58 Sebastian Hahn)

FEATURES:
 o Make URI parser able to tolerate nonconformant URIs. (95060b5)

DOCUMENTATION:
 o Clarify event_set_mem_functions doc (926f816)
 o Correct evhttp_del_accept_socket documentation on whether socket is closed (f665924)
 o fix spelling mistake in whatsnew-2.0.txt (deb2f73)
 o Fix sample/http-server ipv6 fixes (eb692be)
 o Comment internal headers used in sample code. (4eb281c)
 o Be explicit about how long event loops run in event.h documentation (f95bafb)
 o Add comment to configure.in to explain gc-sections test logic (c621359)
 o Fix a couple of memory leaks in samples/http-server.c. Found by Dave Hart. (2e9f665)

BUILD IMPROVEMENTS:
 o Use the gcc -ffunction-segments feature to allow gc when linking with static libevent (0965c56 Dave Hart)
 o Add configure options to disable installation, regression tests (49e9bb7 Dave Hart)



Changes in version 2.0.10-stable (16 Dec 2010)
  [Autogenerated from the Git log, sorted and cleaned by hand.]
BUGFIXES
 o Minor fix for IOCP shutdown handling fix (2599b2d Kelly Brock)
 o Correctly notify the main thread when activating an event from a subthread (5beeec9)
 o Reject overlong http requests early when Expect:100-continue is set (d23839f Constantine Verutin)
 o EVUTIL_ASSERT: Use sizeof() to avoid "unused variable" warnings with -DNDEBUG. (b63ab17 Evan Jones)

CODE CLEANUPS
 o bufferevent-internal.h: Use the new event2/util.h header, not evutil.h (ef5e65a Evan Jones)
 o Use relative includes instead of system includes consistently. (fbe64f2 Evan Jones)
 o Make whitespace more consistent

TESTING
 o tests: Use new event2 headers instead of old compatibility headers. (4f33209 Evan Jones)

DOCUMENTATION
 o Document that the cpu_hint is only used on Windows with IOCP for now (57689c4)
 o Add stuff to "whats new in 2.0" based on reading include changes since August. (18adc3f)


Changes in 2.0.9-rc (30 Nov 2010):
  [Autogenerated from the Git log, sorted and cleaned by hand.]
NEW AND MODIFIED APIs
 o Add a function to change a listener's callback. (46ee061)
 o Make evbuffer_add_file take ev_off_t, not off_t (ac7e52d)
 o Make rate-limits go up to SIZE_MAX/EV_SSIZE_MAX, not just INT32_MAX (2cbb1a1)
 o Add a bufferevent_get_base function (aab49b6)

MAJOR BUGFIXES
 o Disable changelist for epoll by default because of Linux dup() bug; add an option and/or an envvar to reenable it for speed. (9531763)
 o Fix a 100%-CPU bug where an SSL connection would sometimes never stop trying to write (1213d3d)
 o Fix a nasty bug related to use of dup() with epoll on Linux (c281aba)
 o Fix bugs in posix thread-id calculation when sizeof(pthread_t) != sizeof(long) (fbaf077)
 o Fix some ints to evutil_socket_t; make tests pass on win64. (f817bfa Dimitre Piskyulev)
 o Set _EVENT_SIZEOF_VOID_P correctly on win32 and win64 (1ae82cd Dimitre Piskyulev)
 o Avoid double-invocation of user callback with EVUTIL_EAI_CANCEL (abf01ed)
 o Set SO_UPDATE_ACCEPT_CONTEXT on sockets from AcceptEx so that shutdown() can work (52aa419)
 o When closing a filtering bufferevent, clear callbacks on the underlying bufferevent (fc7b1b0)

NEW AND MODIFIED HTTP APIs
 o Add evhttp_parse_query_str to be used with evhttp_uri_parse. (2075fbc)
 o Add evhttp_response_code to remove one more reason to include http_struct.h (22e0a9b)
 o Define enumerators for all HTTP methods, including PATCH from RFC5789 (75a7341 Felix Nawothnig)
 o Functions to actually use evhttp_bound_socket with/as evconnlistener. (006efa7)
 o Add evhttp_request_get_command so code can tell GET from POST without peeking at the struct. (49f4bf7)
 o Introduce absolute URI parsing helpers. (86dd720 Pavel Plesov)
 o Revise evhttp_uri_parse implementation to handle more of RFC3986 (eaa5f1d)
 o Add evhttp_connection_get_base() to get the event_base from an http connection (cd00079)
 o Let evhttp_parse_query return -1 on failure (b1756d0)
 o New evhttp_uri(encode|decode) functions to handle + and NUL characters right (a8148ce)
 o Add evhttp_response_code to remove one more reason to include http_struct.h (22e0a9b)
 o Tweak interface for allowed methods (f5b391e)
 o Add evhttp server alias interface, correct flagging of proxy requests. (aab8c38 Christopher Davis)

HTTP BUGFIXES
 o Add some comments to http.c and make a few functions static. (90b3ed5)
 o Fix Content-Length when trying send more than 100GB of data (!) on an evhttp. (525da3e)
 o Fix a bug where we would read too much data in HTTP bodies or requests. (58a1cc6)
 o Correctly count req->body_size on http usage without Content-Length (8e342e5)
 o Avoid missed-request bug when entire http request arrives before data is flushed (74c0e86)
 o reset "chunked" flag when sending non-chunked reply (aa5f55f Joachim Bauch)
 o evhttp_encode_uri encodes all reserved characters, including !$'()*+,/:=@ (2e63a60)
 o Replace exact-version checks for HTTP/1.1 with >= or < checks (647e094)
 o evhttp: Return 501 when we get an unrecognized method, not 400. (536311a)
 o Don't disable reading from the HTTP connection after sending the request to be notified of connection-close in time (c76640b Felix Nawothnig)
 o Never call evhttp_readcb while writing. (0512487)
 o Try to fix an assertion failure related to close detection (0faaa39)
 o Correctly detect timeouts during http connects (04861d5)
 o Preliminary support for Continue expectation in evhttp. (fa9305f Christopher Davis)

OTHER BUGFIXES
 o Correct logic for realigning a chain in evbuffer_add (e4f34e8)
 o Fix a minor syntax error that most compilers didn't care about (e56ff65)
 o Fix some uses of int for socket in regress (5d389dc)
 o Check return value for ioctlsocket on win32 (f5ad31c Trond Norbye)
 o Fix som event_warns that should have been event_warnx (19c71e7)
 o Fix signal handler types for win64. (b81217f)
 o Try to clear up more size_t vs int/long issues. (598d133)
 o Make sure IOCP evconnlistener uses virtual events. (7b40a00 Christopher Davis)
 o Don't free evdns_request handles until after the callback is invoked (9ed30de)
 o Fix some more cancel-related bugs in getaddrinfo_async (c7cfbcf)
 o Make evdns_getaddrinfo_cancel threadsafe (d51b2fc)
 o Only clear underlying callbacks when the user hasn't reset them. (1ac5b23)
 o Fix bug in bufferevent_connect on an openssl bufferevent that already had an fd (4f228a1)
 o Resolve an evport bug in the thread/forking test (3a67d0b)
 o Make sure the CLOEXEC flag is set on fds we open for base notification (3ab578f)
 o Fix IRIX build.  sa_family collides with a #define in sys/socket.h on IRIX. (e874982 Kevin Bowling)
 o If not WIN32, include <sys/socket.h> in event2/util.h. (1cd45e5 Kevin Bowling)
 o Fix some C99-style comments to work with the xlC compiler. (c2e5e22 Kevin Bowling)
 o Add some checks since lack of TAILQ_FOREACH doesn't imply lack of FIRST, END, NEXT, or INSERT_BEFORE.  Quiet some warnings in XL C. (c4dc335 Kevin Bowling)
 o Reworked AIX __ss_family workaround to use AC_STRUCT_MEMBER. (2e2a3d7 Kevin Bowling)
 o Take select from <sys/select.h> when testing in autoconf.  AIX build fix. (a3a9f6b Kevin Bowling)
 o Fix snprintf related failures on IRIX. (3239073 Kevin Bowling)
 o Remove _event_initialized(); make event_initialized() a function(); make it consistent on windows and non-windows (652024b)
 o Do not let EVLOOP_ONCE exit the loop until all deferred callbacks have run (2d5e1bd)
 o Make EVLOOP_ONCE ignore internal events (0617a81)
 o Possible crash fix when freeing an underlying bufferevent of an openssl bufferevent (29f7623)

HTTP CLEANUPS
 o Stop using Libevent-1 headers in regress_http (1f507d7)
 o Modernize header usage in bench_http.c (e587069)
 o fix signed/unsigned warnings in http.c (74a91e5)
 o Update the HTTP regression tests to use Libevent2 apis for non-http stuff (d9ffa89)
 o Start porting http tests to not use legacy interfaces (8505a74)
 o Convert the rest of the http tests to be non-legacy unit tests. (9bb8239)
 o Rename the confusing "base" static variable in regress_http.c (353402a)
 o Stop accessing http request struct directly from in the unit tests. (0b137f4)
 o Refactor http version parsing into a single function (a38140b)

TESTING
 o Improvements to tinytest_macros.h (ad923a1)
 o Add a huge pile of tests for the new URI functions, and make them pass. (a5a76e6)
 o Unit tests for evhttp_uri_set* (bc98f5e)
 o Increase the skew tolerance to 2 seconds in thread/deferred_cb_skew (f806476 Christopher Davis)
 o Reorder backends in test.sh to match preference order in event.c (ece974f)
 o Add a stress test for getaddrinfo_cancel (da1bf52)
 o Units test for unexpected evhttp methods. (75e3320)

DOCUMENTATION
 o Document behavior of URI parsing more thoroughly. (3a33462)
 o Document that two bufferevent functions only work on socket bufferevents (70e1b60)
 o add a requested docstring for event_rpcgen.CommandLine.__init__ (f1250eb)
 o Fix a mistake in http documentation found by Julien Blache (229714d)
 o Add a basic example of how to write a static HTTP server. (4e794d5)
 o Document event_get_assignment (88be27d)
 o Note that reentrant calls to libevent from logging cbs may fail badly (e431bcd)
 o Clarify EVLOOP_* documentation to be more precise. (057a514)

CLEANUPS
 o Simplify the logic for choosing EPOLL_CTL_ADD vs EPOLL_CTL_MOD (2c66983)
 o Rename "size" variables in win32select that were really fd counts. (b6a158c)
 o Fix even more win64 warnings (7484df6)
 o Fix even more win64 warnings: buffer, event_tagging, http, evdns, evrpc (545a611)
 o Fix more wn64 warnings. (34b84b9 Christopher Davis)
 o Use the label_len local variable in evdns instead of recalculating it over and over (ba01456)
 o Fix some irix compilation warnings spotted by Kevin Bowling (7bcace2)



Changes in 2.0.8-rc (14 Oct 2010):
 [Autogenerated from the Git log, sorted and cleaned by hand.]
NEW APIS
 o Add error callback to evconnlistener (c4be8d8 Simon Perreault)
 o Add a LEV_OPT_THREADSAFE option for threadsafe evconnlisteners (127d4f2)

CHANGED BEHAVIOR
 o Correct logic on disabling underlying bufferevents when disabling a filter (ac27eb8)

BUGFIXES
 o Obey enabled status when unsuspending (040a019 Simon Perreault)
 o Warn when using the error-prone EV_SIGNAL interface in an error-prone way.  Also, fix a couple of race conditions in signal.c (720bd93)
 O Make default signal backend fully threadsafe (95a7d41)
 o Put internal events at highest priority (90651b3)
 o Fix warnings in the main codebase flagged by -Wsigned-compare (9c8db0, 5e4bafb, 5c214a, 6be589a, e06f514)
 o Fix compile in kqueue.c (b395392 Sebastian Hahn)
 o Do not search outside of the system directory for windows DLLs (d49b5e3)
 o Fix a spurious-call bug on epoll.c (0faaee0)
 o Send a shutdown(SHUT_WR) before closing an http connection (e0fd870 Christopher Davis)
 o Fix warnings on mingw with gcc 4.5 (5b7a370)
 o Fix an EINVAL on evbuffer_write_iovec on OpenSolaris. (fdc640b)
 o Fix allocation error for IOCP listeners. Probably harmless, since struct event is big (481ef92)
 o Make iocp/listener/error work; don't accept again if lev is disabled. (62b429a Christopher Davis)
 o Handle rate-limiting for reading on OpenSSL bufferevents correctly. (819b171)
 o Fix serious bugs in per-bufferevent rate-limiting code (34d64f8)
 o Avoid spurious reads from just-created open openssl bufferevents (223ee40)
 o Fix a case where an ssl bufferevent with CLOSE_ON_FREE didn't close its fd (93bb7d8)
 o The corrected bufferevent filter semantics let us fix our openssl tests (34331e4)

TESTING
 o Make SSL tests cover enabling/disabling EV_READ. (a5ce9ad)
 o Bump to the latest version of tinytest (f0bd83e)
 o Unit tests for listener error callbacks (045eef4)
 o New unit test for ssl bufferevents starting with connected SSLs. (02f6259)

DEBUGGABILITY
 o Make debugging output for epoll backend more comprehensive (ec2b05e)
 o Make event.c debugging messages report fds (e119899)
 o Make the --enable-gcc-warnings option include signed comparison warnings (d3b096c)

DEADCODE REMOVAL
 o Remove the now-useless evsig_caught and evsig_process (4858b79)
 o Remove event_base.evsigbase; nothing used it. (38d0960)



Changes in 2.0.7-rc (9 Sep 2010):
 [Autogenerated from the Git log, sorted and cleaned by hand.]
NEW APIS
 o Expose a evdns_base_nameserver_sockaddr_add() function to add a nameserver by sockaddr (1952143)
 o Add event_config_set_num_cpus_hint() for tuning win32 IOCP thread pools, etc. (2447fe8 Christopher Davis)

BUGFIXES
 o Fix a nasty dangling-event bug when using rate-limiting groups (0bffe43)
 o Clean up syntax on TAILQ_ENTRY() usage to build correctly with recent MSVC (60433a0 Gilad Benjamini)
 o Make definition of WIN32_LEAN_AND_MEAN in event.h conditional (3920172 Gilad Benjamini)
 o Correctly detect failure to delete bufferevent read-timeout event (da6e7cd)
 o Set close-on-exec bit for filedescriptors created by dns subsystem (d0b8843)
 o Fix kqueue correctness test on x84_64 (6123d12)
 o Detect events with no ev_base; warn instead of crashing (f1074b7)
 o Fix an issue with forking and signal socketpairs in select/poll backends (d61b2f3)
 o Stop using global arrays to implement the EVUTIL_ctype functions (1fdec20)
 o On windows, make lock/thread function tables static (5de2bcb)
 o Close th_notify_fds and open a new pair on reinit (495ed66)
 o Declare signal handler function as "__cdecl" on Windows (f0056d0)
 o Use the _func() replacements for open, fstat, etc in evutil.c on win32 (e50c0fc)
 o Only process up to MAX_DEFERRED deferred_cbs at a time (17a14f1 Christopher Davis)

THREADING BUGFIXES
 o Avoid deadlock when activating signals (970e6ad)
 o Add a condition variable backend, with implementations for pthreads and win32 (d4977b5)
 o Use conditions instead of current_event_lock to fix a deadlock (e0972c2)
 o Fix logic error in win32 TRY_LOCK that caused problems with rate-limiting (4c32b9d)
 o Avoid needlessly calling evthread_notify_base() when the loop is not running (c7a06bf)
 o Minimize calls to base_notify implementation functions, thereby avoiding needless syscalls (4632b78)

IOCP BUGFIXES
 o IOCP-related evbuffer fixes (03afa20 Christopher Davis)
 o Stop IOCP when freeing the event_base (d844242 Christopher Davis)
 o Some IOCP bufferevent tweaks (76f7e7a Christopher Davis)

TESTS
 o Make the regress_pthread.c tests work on windows with current test APIs (d74ae38)
 o Add a unit test for conditions (5fb1095)
 o Allow more than one copy of regression tests to run at once (a97320a)
 o Fix event_del(0) instance in bench.c (b0f284c Shuo Chen)
 o Fix a few memory leaks in the tests (1115366)
 o IOCP-related unit test tweaks (499452f Christopher Davis)
 o Improve testing of when thread-notification occurs (ce85280)

BUILD AND DISTRIBUTION
 o Add pkgconfig files for libevent_{openssl,pthreads} (ebcb1f0)
 o Change include order in Makefile.nmake (4022b28)
 o Make include/event2/event-config.h not included in source dist (a4af9be)
 o Honor NDEBUG; build without warnings with NDEBUG; make NDEBUG always-off in unit test code (743f866)
 o Declare evkeyvalq and event_list even if event_struct.h comes before sys/queue.h (d3ceca8)
 o Move evkeyvalq into a separate header for evhttp_parse_query users (ca9048f)
 o Prefer autoreconf -ivf to manual autogen.sh (7ea8e89)

CLEANUP
 o Completely remove the (mostly-removed) obsolete thread functions (3808168)
 o Rename regress_pthread.c to regress_thread.c (041989f)
 o Make defer-internal.h use lock macros, not direct calls to lock fns (5218d2a)

DOCUMENTATION
 o Document that DNS_NO_SEARCH is an obsolete alias for DNS_QUERY_NO_SEARCH (33200e7)
 o Update the whatsnew-2.0.txt document (4991669)



Changes in 2.0.6-rc (6 Aug 2010):
 [Autogenerated from the Git log, sorted by hand.]
DOCUMENTATION
 o Document a change in the semantics of event_get_struct_event_size() (e21f5d1)
 o Add a comment to describe our plan for library versioning (9659ece)
 o Fix sentence fragment in docs for event_get_struct_event_size() (7b259b6)

NEW FEATURES AND INTERFACE CHANGES
 o Remove the obsolete evthread interfaces (c5bab56)
 o Let evhttp_send_error infer the right error reasons (3990669)
 o Add a function to retrieve the other side of a bufferevent pair (17a8e2d)
 o Add bufferevent_lock()/bufferevent_unlock() (215e629)
 o Stop asserting when asked for a (unsupported) TCP dns port. Just return NULL. (7e87a59)
 o Replace (unused,always 0) is_tcp argument to evdns_add_server_port*() with flags (e1c1167)
 o Constify a couple of arguments to evdns_server_request_add_*_reply (cc2379d)
 o Add an interface to expose min_share in ratelimiting groups (6ae53d6)

BUGFIXES
 o Avoid event_del on uninitialized event in event_base_free (6d19510)
 o Add some missing includes to fix Linux build again (75701e8)
 o Avoid close of uninitialized socket in evbuffer unit test (bda21e7)
 o Correctly recognize .255 addresses as link-local when looking for interfaces (8c3452b)
 o If no evdns request can be launched, return NULL, not a handle (b14f151)
 o Use generic win32 interfaces, not ASCII-only ones, where possible. (899b0a3)
 o Fix the default HTTP error template (06bd056 Felix Nawothnig)
 o Close the file in evutil_read_file whether there's an error or not. (0798dd1 Pierre Phaneuf)
 o Fix possible nullptr dereference in evhttp_send_reply_end() (29b2e23 Felix Nawothnig)
 o never let bufferevent_rlim functions return negative (0859870)
 o Make sample/hello_world work on windows (d89fdba)
 o Fix a deadlock related to event-base notification.  Diagnosed by Zhou Li, Avi Bab, and Scott Lamb. (17522d2)
 o Possible fix to 100% cpu usage with epoll and openssl (cf249e7 Mike Smellie)
 o Don't race when calling event_active/event_add on a running signal event (fc5e0a2)
 o Suppress a spurious EPERM warning in epoll.c (e73cbde)
 o Fix wrong size calculation of iovec buffers when exact=1 (65abdc2 niks)
 o Change bufferevent_openssl::do_write so it doesn't call SSL_write with a 0 length buffer (c991317 Mike Smellie)
 o Fixed compilation of sample/le-proxy.c on win32 (13b912e Trond Norbye)
 o Fix rate-limit calculation on openssl bufferevents. (009f300)
 o Remember to initialize timeout events for bufferevent_async (de1f5d6 Christopher Davis)

BUILD AND DISTRIBUTION CHANGES
 o Test the unlocked-deferred callback case of bufferevents (dfb75ab)
 o Remove the now-unusable EVTHREAD_LOCK/UNLOCK constants (fdfc3fc)
 o Use -Wlogical-op on gcc 4.5 or higher (d14bb92)
 o Add the libtool-generated /m4/* stuff to .gitignore (c21c663)
 o Remove some automake-generated files from version control. (9b14911)
 o Have autogen.sh pass --force-missing to automake (8a44062)
 o Set library version for libevent_pthreads correctly (b2d7440)
 o Really only add libevent_core.la to LIBADD on mingw (1425003 Sebastian Hahn)
 o Build more cleanly with NetBSDs that dislike toupper(char) (42a8c71)
 o Fix unit tests with -DUSE_DEBUG enabled (28f31a4)
 o Fix evdns build with -DUNICODE (5fa30d2)
 o Move event-config.h to include/event2 (ec347b9)

TESTING
 o Add options to test-ratelim.c to check its results (2b44dcc)
 o Make test-ratelim clean up after itself better. (b5bfc44)
 o Remove the now-obsolete setup_test() and cleanup_test() functions (e73f1d7)
 o Remove all non-error prints from test/regress.c (8bc1e3d)
 o Make test.sh exit with nonzero status if tests fail (faf2a04)
 o Have the unit tests report errors from test.sh (3689bd2)
 o Fix logic in correcting high values from FIONREAD (3467f2f)
 o Add test for behavior on remote socket close (44d57ee)
 o Unit test for event_get_struct_event_size() (7510aac)
 o Make test/test.sh call test-changelist (7c92691)
 o Fix badly-behaved subtest of dns/bufferevent_connect_hostname (840a72f Joachim Bauch)
 o Add option to test-ratelim to test min_share (42f6b62)
 o Fix an assertion bug in test-ratelim (b2c6202)
 o Make tests quieter on local dns resolver failure (e996b3d)
 o Increase the tolerance in our unit tests for sloppy clocks. (170ffd2)
 o Use AF_INET socketpair to test sendfile on Solaris (9b60209)
 o Make test-changelist count cpu usage right on win32 (ea1ea3d)

INTERNALS, PERFORMANCE, AND CODE CLEANUPS
 o Mark the event_err() functions as __attribute__((noreturn)) (33bbbed)
 o Do not check that event_base is set in EVBASE_ACQUIRE_LOCK (218a3c3)
 o Replace (safe) use of strcpy with memcpy to appease OpenBSD (caca2f4)
 o Remove some dead assignments (47c5dfb)
 o Fix a pedantic gcc 4.4 warning in event2/event.h (276e7ee)
 o Drain th_notify_fd[0] more bytes at a time. (a5bc15b)
 o Tidy up the code in evthread_make_base_notifiable a little (61e1eee)
 o Pass flags to fcntl(F_SETFL) and fcntl(F_SETFD) as int, not long (7c2dea1)
 o Remove unused variables in test/test-changelist.c (b00d4c0)
 o Fix whitespace. (cb927a5)
 o Improve error message for failed epoll to make debugging easier. (9e725f7)
 o Turn our socketpair() replacement into its own function (57b30cd)



Changes in 2.0.5-beta (10 May 2010):
 [Autogenerated from the Git log, sorted by hand.]
DOCUMENTATION
 o Update all our copyright notices to say "2010" (17efc1c)
 o Add Christopher Clark and Maxim Yegorushkin to the LICENSE file (38b7b57)
 o Clarify Christopher Clark's status as writer of original ht code. (78772c3)
 o Try to comment some of the event code more (cdd4c49)
 o Add a few more evmap/changelist comments (c247adc)
 o Add a comment to explain why evdns_request is now separte from request (ceefbe8)
 o Document evutil_secure_rng_init() and evutil_secure_rng_add_bytes() (a5bf43a)
 o Stop distributing and installing manpages: they were too inaccurate (7731ec8)

NEW FEATURES AND INTERFACE CHANGES
 o Remove signal_assign() and signal_new() macros. (2fac0f7)
 o Make evdns use the regular logging system by default (b2f2be6)
 o Allow evbuffer_read() to split across more than 2 iovecs (e470ad3)
 o Functions to manipulate existing rate limiting groups. (ee41aca)
 o Functions to track the total bytes sent over a rate limit group. (fb366c1)
 o Detect and refuse reentrant event_base_loop() calls (b557b17)
 o Limit the maximum number of events on each socket to 65535 (819f949)
 o Add evbuffer_copyout to copy data from an evbuffer without draining (eb86c8c)
 o Expose the request and reply members of rpc_req_generic() (07edf78 Shuo Chen)
 o Add void* arguments to request_new and reply_new evrpc hooks (755fbf1 Shuo Chen)
 o Seed the RNG using sysctl() as well as /dev/urandom (71fc3eb)
 o Make evutil_secure_rng_init() work even with builtin arc4random (f980716)
 o Report DNS error when lookup fails during bufferevent_socket_connect_hostname. (0ef4070 Christopher Davis)
 o Release locks on bufferevents while executing callbacks (a5208fe Joachim Bauch) o Make debug mode catch mixed ET and non-ET events on an fd (cb67074)
 o Catch attempts to enable debug_mode too late (9ecf0d4)
 o Refuse null keys in evhttp_parse_query() (953e229 Frank Denis)

BUGFIXES
 o Avoid a spurious close(-1) on Linux (70a44b6)
 o Do not close(-1) when freeing an uninitialized socket bufferevent (b34abf3)
 o Free evdns_base->req_heads on evdns_base_free (859af67)
 o Avoid an (untriggerable so far) crash bug in bufferevent_free() (0cf1431)
 o Set mem_offset for every bufferevent type (657d1b6)
 o Fix infrequent memory leak in bufferevent_init_common(). (8398641 Jardel Weyrich)
 o Make evutil_signal_active() match declaration. (e1e703d Patrick Galbraith)
 o Fix minheap code to use replacement malloc functions (a527618)
 o Fix a free(NULL) in minheap-internal.h (6f20492)
 o Fix critical bug in evbuffer_write when writev is not available (cda56ab)
 o Make the no_iovecs case of write_atmost compile (8e227b0)
 o Fix a memory leak when appending/prepending to a buffer with unused space. (45068a3)
 o Clean up a mistake in pointer manipulation in evbuffer_remove (28bfed4 Christopher Davis)
 o Always round up when there's a fractional number of msecs. (8f9e60c Christopher Davis)
 o Fix compiler warnings under WIN32 (d469c50 Giuseppe Scrivano)
 o Clean up properly when adding a signal handler fails. (b84b598 Gilad Benjamini) o Ensure that evdns_request is a persistent handle. (15bb82d Christopher Davis)
 o Free search state when finished searching to avoid an infinite loop. (a625840 Christopher Davis)
 o Assert for valid requests as necessary. (67072f3 Christopher Davis)
 o do not leak the request object on persistent connections (9d8edf2)
 o Make evdns logging threadsafe (b1c7950)
 o Fix a couple of bugs in the BSD sysctl arc4seed logic (a47a4b7)
 o Remove one last bug in last_with_datap logic. Found with valgrind (d49b92a)
 o fix a leak when unpausing evrpc requests (94ee125)
 o Fix a memory leak when unmarshalling RPC object arrays (f6ab2a2)
 o Fix compilation when openssl support is disabled (40c301b)
 o Allow empty reason line in HTTP status (739e688 Pierre Phaneuf)
 o Fix a compile warning introduced in 739e688 (bd1ed5f Sebastian Hahn)
 o Fix nonstandard TAILQ_FOREACH_REVERSE() definition (71afc52 Frank Denis)
 o Try /proc on Linux as entropy fallback; use sysctl as last resort (20fda29)
 o Fix symbol conflict between mm_*() macros and libmm (99e50e9)
 o Fix some crazy macro mistakes in arc4random.c (90d4225)
 o Make evbuffer_add_file() work on windows (dcdae6b)
 o Fix unused-variable warning when building with threads disabled (ad811cd)
 o Numerous opensolaris compilation fixes (c44de06)
 o Fix getaddrinfo with protocol unset on Solaris 9. Found by Dagobert Michelsen (2cf2a28)
 o Fix another nasty solaris getaddrinfo() behavior (3557071)
 o Define _REENTRANT as needed on Solaris, elsewhere (c1cd32a)
 o Fix some autoconf issues on OpenBSD (7c519df)

BUILD AND DISTRIBUTION CHANGES
 o Distribute libevent.pc.in, not libevent.pc (22aff04)
 o Avoid errors in evutil.c when building with _UNICODE defined (b677032 Brodie Thiesfield)
 o Avoid errors in http.c when building with VC 2003 .NET (13e4f3b Brodie Thiesfield)
 o Support the standard 'make check' target in place of 'make verify' (426c8fb)
 o Remove redundant stuff from EXTRA_DIST (b660edf)
 o Switch to using AM conditionals in place of AC_LIBOBJ (2e898f5)
 o Remove an orphaned RELEASE flag in Makefile.am (0794b0d)
 o Give a better warning for bad automake versions. (77c917d)
 o Use dist_bin_SCRIPTS, not EXTRA_DIST, to distribute scripts (9eb2fd7)
 o Never test for select() on windows (3eb044d Trond Norbye)
 o Do not inhibit automake dependencies generation (10c4c90 Giuseppe Scrivano)
 o Create shared libraries under Windows (3cbca86 Giuseppe Scrivano)
 o Add ctags/etags files to .gitignore (0861d17)
 o Only specify -no-undefined on mingw (25433b9)
 o Only add libevent_core.la to LIBADD on mingw (fdc6297)

TESTING
 o Get bench_http to work on Windows; add a switch to enable IOCP. (4ac38a5 Christopher Davis)
 o VC has no getopt(), so do without in bench_http. (1273d2f Christopher Davis)
 o Fix an obnoxious typo in the bufferevent_timeout_filter test (0d047c3)
 o Fix a write of uninitialized RAM in regression tests (68dc742)
 o Fix some memory leaks in the unit tests (274a7bd)
 o Make 'main/many_events' test 70 fds, not 64. (33874b0)
 o Unit-test every evbuffer_add_file() implementation. (06a4443)
 o Add more unit tests for evbuffer_expand (8c83e99)
 o Test another case of evbuffer_prepend (1234b95)
 o Fix a possible double-free bug in SSL bufferevents with CLOSE_ON_FREE (7501895) o Add dns/search_cancel unit test. (39b870b Christopher Davis)
 o Make http_base_test stop leaking an event_base. (96730d3)
 o Detect broken unsetenv at unit-test runtime (f37cd4c)
 o Implement regress_make_tempfile on win32 to test evbuffer_add_file (b4f12a1)
 o add more (currently skipped) add_file tests on win32 (05de45d)
 o Fix bench_http build on win32. (384d124)
 o Make unit test for add_file able to tell "error" from "done" (88a543f)
 o Make test for bufferevent_connect_hostname system-neutral (f89168e)
 o Make test.sh support mingw/msys on win32 (0ee6f6c)
 o Fix test.sh on freebsd (3d9e05b)

INTERNALS, PERFORMANCE, AND AND CODE CLEANUPS
 o Improve the speed of evbuffer_readln() (cc1600a)
 o more whitespace normalization (2c2618d)
 o Revise evbuffer to add last_with_data (2a6d2a1)
 o Use last_with_data in place of previous_to_last (c8ac57f)
 o Remove previous_to_last from evbuffer (6f47bd1)
 o Fix last_with_data compilation on windows (1e7b986)
 o Add some glass-box tests for the last_with_data code. (17da042)
 o Improve robustness for refcounting (f1bc125)
 o Remove a needless min_heap_shift_up_() call (7204b91)
 o Increase MIN_BUFFER_SIZE to 512 (1024 on 64-bit) (2014ae4)
 o Do not use evbuffer_expand() to add the first chain to a buffer (5c0ebb3)
 o Make evbuffer_prepend handle empty buffers better (c87272b)
 o Replace last_with_data with a slightly smarter version (b7442f8)
 o Turn the increasingly complex *_CHAIN() macros into functions (96865c4)
 o Rewrite evbuffer_expand and its users (d5ebcf3)
 o Add evutil_tv_to_msec for safe conversion of timevals to milliseconds. (850c3ff Christopher Davis)
 o Initialize last_with_datap correctly in evbuffer_overlapped (a0983b6)
 o Replace EVUTIL_CLOSESOCKET macro with a function (899c1dc Sebastian Sjöberg)
 o Move domain search state to evdns_request. (beaa14a Christopher Davis)
 o Remove redundant checks for lock!=NULL before calling EVLOCK_LOCK (50ec59f)
 o Rename current_base symbol to event_global_current_base_ (c16e684)
 o Fix whitespace in evutil.c (935e150)
 o Replace users of "int fd" with "evutil_socket_t fd" in portable code (c7cf6f0)



Changes in 2.0.4-alpha (28 Feb 2010):
 [Autogenerated from the Git log, sorted by hand.]
DOCUMENTATION
 o Add stub header for 2.0.4-alpha changelog. (94d0065)
 o Improve the README with more information and links. (0b42726)
 o Add more people who wrote patches to the acknowledgments (0af10d5)
 o Add a warning about the use of event_initialized. (f32b575)
 o Add a LICENSE file so people can find our license easily (7067006)
 o Add a new "hello world" sample program (becb9f9)
 o Clarify status of example programs (d60a1bd)
 o Update time-test.c to use event2 (f4190bf)
 o Add the arc4random.c license to the LICENSE file. (e15e1e9)

NEW FEATURES AND INTERFACE CHANGES
 o Improved optional lock debugging. (0cd3bb9)
 o Rate-limiting for bufferevents; group and individual limits are supported. (737c9cd)
 o Testing code for bufferevent rate-limiting. (f0c0124)
 o Make the initial nameserver probe timeout configurable. (1e56a32)
 o Revise the locking API: deprecate the old locking callbacks and add trylock. (347952f)
 o Do not make bufferevent_setfd implicitly disable EV_READ and EV_WRITE. (8274379)
 o Do not ignore bufferevent_enable(EV_READ) before bufferevent_connect(). (4a5b534)
 o Introduced evutil_make_socket_closeonexec() to preserve fd flags for F_SETFD. (d0939d2 Jardel Weyrich)
 o evdns_getaddrinfo() now supports the /etc/hosts file. (72dd666)
 o Look at the proper /etc/hosts file on windows. (66c02c7)
 o Allow http connections to use evdns for hostname looksups. (c698b77)
 o Changelist code to defer event changes until just before dispatch (27308aa)
 o do not use a function to assign the evdns base; instead assign it via evhttp_connection_base_new() which is a new function introduced in 2.0 (5032e52)
 o Functions to access more fields of struct event. (0683950)
 o Make kqueue use changelists. (45e5ae3)
 o Remove kqueue->pend_changes. (3225dfb)
 o Minimize epoll_ctl calls by using changelist (c8c6a89)
 o Add support for a "debug mode" to try to catch common errors. (cd17c3a)
 o Note a missing ratelim function (361da8f)
 o Add ev_[u]intptr_t to include/event2/util.h (1fa4c81)
 o const-ify a few more functions in event.h (d38a7a1)
 o Deprecate EVENT_FD and EVENT_SIGNAL. (f6b2694)
 o Remove EVUTIL_CHECK_FMT. (6c21c89)
 o Add EV_*_MAX macros to event2/util.h to expose limits for ev_* types. (aba1fff) o Functions to view and manipulate rate-limiting buckets. (85047a6)
 o Add the rest of the integer limits, and add a test for them. (60742d5)
 o Remove the 'flags' argument from evdns_base_set_option() (1dd7e6d)
 o Add an arc4random implementation for use by evdns (d4de062)
 o Use off_t for the length parameter of evbuffer_add_file (3fe60fd)
 o Construct Windows locks using InitializeCriticalSectionAndSpinCount (32c6f1b)
 o Expose view of current rate limit as constrained by group limit (162ce8a)
 o Provide consistent, tested semantics for bufferevent timeouts (d328829)

BUGFIXES AND TESTS
 o Tolerate code that returns from a fatal_cb. (91fe23f)
 o Parenthesize macro arguments more aggressively (07e9e9b)
 o Fix memory-leak of signal handler array with kqueue. (e1ffbb8)
 o Stop passing EVTHREAD_READ and EVTHREAD_WRITE to non-rw locks. (76cd2b7)
 o Fix two use-after-free bugs in unit tests spoted by lock debugging (d84d838)
 o Fix a locking bug in event_base_loop() (da1718b)
 o Fix an evdns lock violation. (2df1f82 Zhuang Yuyao)
 o Valgrind fix: Clear struct kevent before checking for OSX bug. (56771a3 William Ahern)
 o Fix up evthread compilation on windows (bd6f1ba Roman Puls)
 o Fix regress_iocp.c usage of old lock allocation macros. (31687b4 unknown)
 o Update nmake makefile to build evthread.c (b62d979 unknown)
 o Fix a crash when reading badly formatted resolve.conf; from Yasuoka Masahiko (6c7c579 Yasuoka Masahiko)
 o Fix a snow leopard compile warning in the unit tests. (7ae9445)
 o Fix compile on Snow Leopard with gcc warnings enabled (70cdfe4 Sebastian Hahn)
 o Only define _GNU_SOURCE if it is not already defined. (ea6b1df Joachim Bauch)
 o Update sample/signal-test.c to use newer APIs and not leak. (f6430ac Evan Jones)
 o Fix a segfault when writing a very fragmented evbuffer onto an SSL (a6adeca Joachim Bauch)
 o Fix a segfault when freeing SSL bufferevents in an unusual order (a773df5 Joachim Bauch)
 o Drop install-sh from our git repo: a mismatched version could break "make dist" (6799527)
 o Set all instances of the version number correctly. (5a112d3)
 o Fix a few locking issues on windows. (c51bb3c unknown)
 o Use evutil_socket_t, not int, when logging socket errors. (292467c)
 o Fix up behavior of never-defered callbacks a little (390e056)
 o Replace some cases of uint32_t with ev_uint32_t. (a47d88d)
 o Fix compilation of devpoll.c by adding missing thread includes. (fee2c77 Dagobert Michelsen)
 o Make evutil_make_socket_nonblocking() leave any other flags alone. (4c8b7cd Jardel Weyrich)
 o Fix an fd leak in evconnlistener_new_bind(). (24fb502 Jardel Weyrich)
 o Fix a bogus free in evutil_new_addrinfo() (0d64051 Jardel Weyrich)
 o Adjusted fcntl() retval comparison on evutil_make_socket_nonblocking(). (4df7dbc Jardel Weyrich)
 o Fix the code that allowed DNS options to not end with : (ee4953f)
 o Fix crash bugs when a bufferevent's eventcb is not set. (2e8eeea)
 o Fix test-ratelim compilation on Linux. (885b427)
 o Fix compilation of rate-limiting code on win32. (165d30e)
 o Eradicated the last free() call. Let mm_free() take care of deallocation. (0546ce1 Jardel Weyrich)
 o Fix byte counts when mixing deferred and non-deferred evbuffer callbacks. (29151e6)
[--snip--]
