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)
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)
o Fixed a memory leak on windows threads implementation. The CRITICAL_SECTION was not being free'd in evthread_win32_lock_free(). (2f33e00 Jardel Weyrich)
o Fixed a fd leak in start_accepting(), plus cosmetic changes (4367a33 Jardel Weyrich)
o Improved error handling in evconnlistener_new_async(). Also keeping the fd open because it is not opened by this function, so the caller is responsible for closing it. Additionally, since evconnlistener_new_bind() creates a socket and passes it to the function above, it required error checking to close the same socket. (fec66f9 Jardel Weyrich)
o Don't use a bind address for nameservers on loopback (8d4aaf9)
o Fix compilation of rate-limit code when threading support is disabled (97a8c79)
o Detect setenv/unsetenv; skip main/base_environ test if we can't fake them. (7296971)
o Check more internal event_add() calls for failure (ff3f6cd)
o Fix windows and msvc build (5c7a7bc)
o Call event_debug_unassign on internal events (a19b4a0)
o Try to fix a warning in hash_debug_entry (137f2c6)
o Fix a dumb typo in ev_intptr_t definitions. (27c9a40)
o do not fail while sending on http connections the client closed. (93d7369)
o make evhttp_send() safe against terminated connections, too (3978180)
o Make Libevent 1.4.12 build on win32 with Unicode enabled. (000a33e Brodie Thiesfield)
o Fix some additional -DUNICODE issues on win32. (a7a9431)
o Add a check to make soure our EVUTIL_AI flags do not conflict with the native ones (c18490e)
o Always use our own gai_strerror() replacement. (6810bdb)
o Make RNG work when we have arc4random() but not arc4random_buf() (4ec8fea)
o validate close cb on server when client connection closes (2f782af)
o Fix two unlocked reads in evbuffer. (7116bf2)
o When working without a current event base, don't try to use IOCP listeners (cb52838)
o Fix getpid() usage on Windows (ff2a134)
o Add a unit test for secure rng. (48a29b6)
o Add some headers to fix freebsd compilation (b72be50)
o When connect() succeeds immediately, don't invoke the callback immediately. (7515de9)
o Suspend read/write on bufferevents during hostname lookup (db08f64)
o Make bufferevent_free() clear all callbacks immediately. (b2fbeb3)
o Fix some race conditions in persistent events and event_reinit (e2642f0)
o Fix a bug in resetting timeouts on persistent events when IO triggers. (38ec0a7)
o Add a test for timeouts on filtering bufferevents. (c02bfe1)
o Add test for periodic timers that get activated for other reasons (8fcb7a1)
o Use new timeval diff comparison function in bufferevent test (f3dfe46)
o Delete stack-alloced event in new unit test before returning. (7ffd387)
o Fix mingw compilation (23170a6)
o Try to define a sane _EVENT_SIZEOF_SIZE_T for msvc compilation (1e14f82)
o Fix arc4random compilation on MSVC. (98edb89)
o deal with connect() failing immediately (7bc48bf)
o Small cleanups on freebsd-connect-refused patch. (57b7248)
BUILD AND DISTRIBUTION CHANGES
o Remove the contents of WIN32-Prj as unmaintained. (c69d5a5)
o Allow the user to redirect the verbose output of test/test.sh to a file (c382de6)
o Allow test.sh to be run as ./test/test.sh (7dfbe94)
o Never believe that we have pthreads on win32, even if gcc thinks we do. (78ed097)
o Make it compile under gcc --std=c89. (e2ca403)
o Fix a number of warnings from gcc -pedantic (918e9c5)
o Add the msvc-generated .lib files to .gitignore. (e244a2e)
o Add the "compile" script to gitignore. (1ba6bed)
INTERNALS AND CODE CLEANUPS
o Add a .gitignore file. (ba34071)
o New EVTHREAD_TRY_LOCK function to try to grab a lock. (689fc09)
o Add the abilitity to mark some buffer callbacks as never-deferred. (438f9ed)
o Refactor our 'suspend operation' logic on bufferevents. (0d744aa)
o Simplify the read high-watermark checking. (5846bf6)
o Improve readability of evutil_unparse_protoname() (5a43df8 Jardel Weyrich)
o Expose our cached gettimeofday value with a new interface (47854a8)
o Whitespace fixes in test.sh (0b151a9)
o Enable branch-prediction hints with EVUTIL_UNLIKELY. (eaaf27f)
o Refactor code from evdns into a new internal "read a file" function. (0f7144f)
o Comestic changes in evconnlistener_new(), new_accepting_socket(), accepted_socket_invoke_user_cb() and iocp_listener_enable(). (510ab6b Jardel Weyrich)
o Add unit-test for bad_request bug fixed in 1.4 recently. (6cc79c6 Pavel Plesov) o Add a comment on evthread_enable_lock_debuging. (b9f43b2)
o Fix test.sh on shells without echo -n (94131e9)
o More unit tests for getaddrinfo_async: v4timeout and cancel. (a334b31)
o Make http use evconnlistener. (ec34533)
o move dns utility functions into a separate file so that we can use them for http testing (b822639)
o add a test for evhttp_connection_base_new with a dns_base (26714ca)
o forgot to add void to test function (78a50fe)
o Add a forgotten header (changelist-internal.h) (4b9f307)
o Remove some commented-out code in evutil (26e1b6f)
o Remove a needless include of rpc_compat.h (70a4a3e)
o Use less memory for each entry in a hashtable (a66e947)
o Try to untangle the logic in server_port_flush(). (439aea0)
o Use ev_[u]intptr_t types in place of [u]intptr_t (cef61a2)
o Reduce windows header includes in our own headers. (da6135e)
o clean up terminate_chunked test (e8a9782)
o Increment the submicro version number. (63e868e)
o Update event-config.h version number to match configure.in (aae7db5)
o Clean up formatting: Disallow space-before-tab. (8fdf09c)
o Clean up formatting: use tabs, not 8-spaces, to indent. (e5bbd40)
o Clean up formatting: remove trailing spaces (e5cf987)
o Clean up formatting: function/keyword spacing consistency. (4faeaea)
o If the kernel tells us that there are a negative number of bytes to read from a socket, do not believe it. Fixes bug 2841177; found by Alexander Pronchenkov.
o Do not allocate the maximum event queue for the epoll backend at startup. Instead, start out accepting 32 events at a time, and double the queue's size when it seems that the OS is generating events faster than we're requesting them. Saves up to 374K per epoll-based event_base. Resolves bug 2839240.
o New event_base_got_exit() and event_base_got_break() functions to tell whether an event loop exited because of an event_base_loopexit() or an event_base_loopbreak(). Patch from Ka-Hing Cheung.
o Have the win32 select() backend label TCP-socket-connected events as EV_WRITE, not EV_READ. This should bring it in line with the other backends, and improve portability. Patch from Christopher Davis.
o Stop using enums as arguments or return values when what we mean is a bitfield of enum values. C++ doesn't believe that you can OR two enum values together and get another enum, and C++ takes its typing seriously. Patch from Christopher Davis.
o The event_base_new() and event_base_new_with_config() functions now never call exit() on failure. For backward "compatibility", event_init() still does, but more consistently.
o Finally expose the IOCP-based bufferevent backend. It passes its unit tests, but probably still has some bugs remaining. Code by Nick Mathewson and Christopher Davis.
o Do not use vararg macros for accessing evrpc structures; this is not backwards compatible, but we did not promise any backwards compatibility for the rpc code.
o Rename the evbuffercb and everrorcb callbacks to bufferevent_data_cb and bufferevent_event_cb respectively. The old names are available in bufferevent_compat.h.
o Rename the EVBUFFER_* codes used by bufferevent event callbacks to BEV_EVENT_*, to avoid namespace collision with evbuffer flags. The old names are available in bufferevent_compat.h.
o Move the EVBUFFER_INPUT and EVBUFFER_OUTPUT macros to bufferevent_compat.h
o Revise the new evbuffer_reserve_space/evbuffer_commit_space() interfaces so that you can use them without causing extraneous copies or leaving gaps in the evbuffer.
o Add a new evbuffer_peek() interface to inspect data in an evbuffer without removing it.
o Activate fd events in a pseudorandom order with O(N) backends, so that we don't systematically favor low fds (select) or earlier-added fds (poll, win32).
o Rename encode_int[64] to evtag_encode_int[64] to avoid polluting the global namespace. The old method names are still available as macros in event2/tag_compat.h.
o New function, event_{base_}loopbreak. Like event_loopexit, it makes an event loop stop executing and return. Unlike event_loopexit, it keeps subsequent pending events from getting executed. Patch from Scott Lamb
o New function event_set_mem_functinons. It allows the user to give libevent replacement functions to use for memory management in place of malloc(), free(), etc. This should be generally useful for memory instrumentation, specialized allocators, and so on.
o The kqueue implementation now catches signals that are raised after event_add() is called but before the event_loop() call. This makes it match the other implementations.
o The kqueue implementation now restores original signal handlers correctly when its signal events are removed.
o Add a more powerful evbuffer_readln as a replacement for evbuffer_readline. The new function handles more newline styles, and is more useful with buffers that may contain a nul characters.
o The configure script now takes an --enable-gcc-warnigns option that turns on many optional gcc warnings. (Nick has been building with these for a while, but they might be useful to other developers.)
o pull setters/getters out of RPC structures into a base class to which we just need to store a pointer; this reduces the memory footprint of these structures.
o change evrpc hooking to allow pausing of RPCs; this will make it possible for the hook to do some meaning ful work; this is not backwards compatible.
o Correctly handle timeouts larger than 35 minutes on Linux with epoll.c. This is probably a kernel defect, but we'll have to support old kernels anyway even if it gets fixed.
o New functions (event_assign, event_new, event_free) for use by apps that want to be safely threadsafe, or want to remain ignorant of the contents of struct event.
o Support input/output filters for bufferevents; somewhat similar to libio's model. This will allow us to implement SSL, compression, etc, transparently to users of bufferevents such as the http layer.
o add new evtimer_assign, signal_assign, evtimer_new, and signal_new functions to manipulate timer and signal events, analagous to the now-recommended event_assign and event_new
o switch internal uses of event_set over to use event_assign.
o turn event_initialized() into a function, and add function equivalents to EVENT_SIGNAL and EVENT_FD so that people don't need to include event_struct.h
o deliver partial data to request callbacks when chunked callback is set even if there is no chunking on the http level; allows cancelation of requests from within the chunked callback; from Scott Lamb.
o Support multiple events listening on the same signal; make signals regular events that go on the same event queue; problem report by Alexander Drozdov.
o Set the 0x20 bit on outgoing alphabetic characters in DNS requests randomly, and insist on a match in replies. This helps resist DNS poisoning attacks.
o Restructure the event backends so that they do not need to keep track of events themselves, as a side effect multiple events can use the same fd or signal.
o Add an evutil module (with header evutil.h) to implement our standard cross-platform hacks, on the theory that somebody else would like to use them too.
o Make autogen.sh script run correctly on systems where /bin/sh isn't bash. (Patch from Trond Norbye, rewritten by Hagne Mahre and then Hannah Schroeter.)
o Skip calling gettime() in timeout_process if we are not in fact waiting for any events. (Patch from Trond Norbye)
o Fix implementation of getaddrinfo on platforms that lack it; mainly, this will make Windows http.c work better. Original patch by Lubomir Marinov.
o Fix evport implementation: port_disassociate called on unassociated events resulting in bogus errors; more efficient memory management; from Trond Norbye and Prakash Sangappa
o added two additional libraries: libevent_core and libevent_extra in addition to the regular libevent. libevent_core contains only the event core whereas libevent_extra contains dns, http and rpc support
o Begin using libtool's library versioning support correctly. If we don't mess up, this will more or less guarantee binaries linked against old versions of libevent continue working when we make changes to libevent that do not break backward compatibility.
o Remove support for the rtsig method: it hasn't compiled for a while, and nobody seems to miss it very much. Let us know if there's a good reason to put it back in.
o Rename the "class" field in evdns_server_request to dns_question_class, so that it won't break compilation under C++. Use a macro so that old code won't break. Mark the macro as deprecated.
o Fix DNS unit tests so that having a DNS server with broken IPv6 support is no longer cause for aborting the unit tests.
o Make event_base_free() succeed even if there are pending non-internal events on a base. This may still leak memory and fds, but at least it no longer crashes.
o Post-process the config.h file into a new, installed event-config.h file that we can install, and whose macros will be safe to include in header files.
o Remove the long-deprecated acconfig.h file.
o Do not require #include <sys/types.h> before #include <event.h>.
o Add new evutil_timer* functions to wrap (or replace) the regular timeval manipulation functions.
