CHANGES

  *) core: Pass ap_errorlog_info struct to error log hook. [Stefan Fritsch]

  *) mod_cache_disk: Make sure we check return codes on all writes and
     attempts to close, and clean up after ourselves in these cases.
     PR43589. [Graham Leggett]

  *) mod_cache_disk: Remove the unnecessary intermediate brigade while
     writing to disk. Fixes a problem where mod_disk_cache was leaving
     buckets in the intermediate brigade and not passing them to out on
     exit. [Florian S. <f_los_ch yahoo.com>, Graham Leggett]

  *) mod_ssl: use a shorter setting for SSLCipherSuite in the default
     default configuration file, and add some more information about
     configuring a speed-optimized alternative.
     [Kaspar Brand]

  *) mod_ssl: drop support for the SSLv2 protocol. [Kaspar Brand]

  *) mod_lua: Stop losing track of all but the most specific LuaHook* directives
     when multiple per-directory config sections are used.  Adds LuaInherit 
     directive to control how parent sections are merged.  [Eric Covener]

  *) Server directive display (-L): Include directives of DSOs.
     [Jeff Trawick]

  *) mod_cache: Make sure we merge headers correctly when we handle a
     non cacheable conditional response. PR52120. [Graham Leggett]

  *) Pre GA removal of components that will not be included:
     - mod_noloris was superseded by mod_reqtimeout
     - mod_serf
     - mpm_simple
     [Rainer Jung]

  *) core: Set MaxMemFree 2048 by default. [Stefan Fritsch]

  *) mpm_event: Fix assertion failure during very high load. [Stefan Fritsch]

  *) configure: Additional modules loaded by default: mod_headers.
     Modules moved from module set "few" to "most" and no longer loaded
     by default: mod_actions, mod_allowmethods, mod_auth_form, mod_buffer,
     mod_cgi(d), mod_include, mod_negotiation, mod_ratelimit, mod_request,
     mod_userdir. [Rainer Jung]

  *) mod_lua: Use the right lua scope when used as a hook. [Rainer Jung]

  *) configure: Only load the really imporant modules (i.e. those enabled by
     the 'few' selection) by default. Don't handle modules enabled with
     --enable-foo specially. [Stefan Fritsch]

  *) end-generation hook: Fix false notification of end-of-generation for
     temporary intervals with no active MPM children.  [Jeff Trawick]

  *) mod_ssl: Add support for configuring persistent TLS session ticket
     encryption/decryption keys (useful for clustered environments).
     [Paul Querna, Kaspar Brand]

  *) mod_usertrack: Use random value instead of remote IP address.
     [Stefan Fritsch]

Changes with Apache 2.3.15

  *) SECURITY: CVE-2011-3348 (cve.mitre.org)
     mod_proxy_ajp: Respond with HTTP_NOT_IMPLEMENTED when the method is not
     recognized.  [Jean-Frederic Clere]

  *) SECURITY: CVE-2011-3192 (cve.mitre.org)
     core: Fix handling of byte-range requests to use less memory, to avoid
     denial of service. If the sum of all ranges in a request is larger than
     the original file, ignore the ranges and send the complete file.
     PR 51714. [Stefan Fritsch, Jim Jagielski, Ruediger Pluem, Eric Covener,
     <lowprio20 gmail.com>]

  *) SECURITY: CVE-2011-3607 (cve.mitre.org)
     core: Fix integer overflow in ap_pregsub. This can be triggered e.g.
     with mod_setenvif via a malicious .htaccess. [Stefan Fritsch]

  *) SECURITY: CVE-2011-3368 (cve.mitre.org)
     Reject requests where the request-URI does not match the HTTP
     specification, preventing unexpected expansion of target URLs in
     some reverse proxy configurations.  [Joe Orton]

  *) configure: Load all modules in the generated default configuration
     when using --enable-load-all-modules. [Rainer Jung]

  *) mod_reqtimeout: Change the default to set some reasonable timeout
     values. [Stefan Fritsch]

  *) core, mod_dav_fs: Change default ETag to be "size mtime", i.e. remove
     the inode. PR 49623. [Stefan Fritsch]

  *) mod_lua: Expose SSL variables via r:ssl_var_lookup().  [Eric Covener]

  *) mod_lua: LuaHook{AccessChecker,AuthChecker,CheckUserID,TranslateName}
     can now additionally be run as "early" or "late" relative to other modules.
     [Eric Covener]

  *) configure: By default, only load those modules that are either required
     or explicitly selected by a configure --enable-foo argument. The
     LoadModule statements for modules enabled by --enable-mods-shared=most
     and friends will be commented out. [Stefan Fritsch]

  *) mod_lua: Prevent early Lua hooks (LuaHookTranslateName and 
     LuaHookQuickHandler) from being configured in <Directory>, <Files>, 
     and htaccess where the configuration would have been ignored.
     [Eric Covener]

  *) mod_lua: Resolve "attempt to index local 'r' (a userdata value)" errors
     in LuaMapHandler scripts [Eric Covener]

  *) mod_log_debug: Rename optional argument from if= to expr=, to be more
     in line with other config directives. [Stefan Fritsch]

  *) mod_headers: Require an expression to be specified with expr=, to be more
     in line with other config directives. [Stefan Fritsch]

  *) mod_substitute: To prevent overboarding memory usage, limit line length
     to 1MB. [Stefan Fritsch]

  *) mod_lua: Make the query string (r.args) writable. [Eric Covener]

  *) mod_include: Add support for application/x-www-form-urlencoded encoding
     and decoding. [Graham Leggett]

  *) rotatelogs: Add -c option to force logfile creation in every rotation 
     interval, even if empty.  [Jan Kaluža <jkaluza redhat.com>]

  *) core: Limit ap_pregsub() to 64K, add ap_pregsub_ex() for longer strings.
     [Stefan Fritsch]

  *) mod_session_crypto: Refactor to support the new apr_crypto API.
     [Graham Leggett]

  *) http: Add missing Location header if local URL-path is used as
     ErrorDocument for 30x. [Stefan Fritsch]

  *) mod_buffer: Make sure we step down for subrequests, but not for internal
     redirects triggered by mod_rewrite. [Graham Leggett]

  *) mod_lua: add r:construct_url as a wrapper for ap_construct_url.
     [Eric Covener]

  *) mod_remote_ip: Fix configuration of internal proxies. PR 49272.
     [Jim Riggs <jim riggs me>]

  *) mpm_winnt: Handle AcceptFilter 'none' mode correctly; resolve specific
     server IP endpoint and remote client IP upon connection.  [William Rowe]

  *) mod_setenvif: Remove OID match which is obsoleted by SetEnvIfExpr with
     PeerExtList(). [Stefan Fritsch]

  *) mpm_prefork, mpm_worker, mpm_event: If a child is created just before
     graceful restart and then exits because of a missing lock file, don't
     shutdown the whole server. PR 39311. [Shawn Michael
     <smichael rightnow com>]

  *) mpm_event: Check the return value from ap_run_create_connection.
     PR 41194. [Davi Arnaut]

  *) mod_mime_magic: Add signatures for PNG and SWF to the example config.
     PR 48352. [Jeremy Wagner-Kaiser <jwagner-kaiser adknowledge com>]

  *) core, unixd: Add -D DUMP_RUN_CFG option to dump some configuration items
     from the parsed (or default) config. This is useful for init scripts that
     need to setup temporary directories and permissions. [Stefan Fritsch]

  *) core, mod_actions, mod_asis: Downgrade error log messages which accompany
     a 404 request status from loglevel error to info. PR 35768. [Stefan
     Fritsch]

  *) core: Fix hook sorting with Perl modules. PR 45076. [Torsten Foertsch
     <torsten foertsch gmx net>]

  *) core: Enforce LimitRequestFieldSize after multiple headers with the same
     name have been merged. [Stefan Fritsch]

  *) mod_ssl: If MaxMemFree is set, ask OpenSSL >= 1.0.0 to reduce memory
     usage.  PR 51618. [Cristian Rodríguez <crrodriguez opensuse org>,
     Stefan Fritsch]

  *) mod_ssl: At startup, when checking a server certificate whether it
     matches the configured ServerName, also take dNSName entries in the
     subjectAltName extension into account. PR 32652, PR 47051. [Kaspar Brand]

  *) mod_substitute: Reduce memory usage and copying of data. PR 50559.
     [Stefan Fritsch]

  *) mod_ssl/proxy: enable the SNI extension for backend TLS connections
     [Kaspar Brand]

  *) Add wrappers for malloc, calloc, realloc that check for out of memory
     situations and use them in many places. PR 51568, PR 51569, PR 51571.
     [Stefan Fritsch]

  *) Fix cross-compilation of mod_cgi/mod_cgid when APR_HAVE_STRUCT_RLIMIT is 
     false but RLIMIT_* are defined.  PR51371. [Eric Covener]

  *) core: Correctly obey ServerName / ServerAlias if the Host header from the
     request matches the VirtualHost address.
     PR 51709. [Micha Lenk <micha lenk.info>]

  *) mod_unique_id: Use random number generator to initialize counter.
     PR 45110. [Stefan Fritsch]

  *) core: Add convenience API for apr_random. [Stefan Fritsch]

  *) core: Add MaxRangeOverlaps and MaxRangeReversals directives to control
     the number of overlapping and reversing ranges (respectively) permitted
     before returning the entire resource, with a default limit of 20.
     [Jim Jagielski]

  *) mod_ldap: Optional function uldap_ssl_supported(r) always returned false
     if called from a virtual host with mod_ldap directives in it.  Did not
     affect mod_authnz_ldap's usage of mod_ldap.  [Eric Covener]

  *) mod_filter: Instead of dropping the Accept-Ranges header when a filter
     registered with AP_FILTER_PROTO_NO_BYTERANGE is present,
     set the header value to "none". [Eric Covener, Ruediger Pluem]

  *) core: Allow MaxRanges none|unlimited|default and set 'Accept-Ranges: none'
     in the case Ranges are being ignored with MaxRanges none.
     [Eric Covener]

  *) mod_ssl: revamp CRL-based revocation checking when validating
     certificates of clients or proxied servers. Completely delegate
     CRL processing to OpenSSL, and add a new [Proxy]CARevocationCheck
     directive for controlling the revocation checking mode. [Kaspar Brand]

  *) core: Add MaxRanges directive to control the number of ranges permitted
     before returning the entire resource, with a default limit of 200.
     [Eric Covener]

  *) mod_cache: Ensure that CacheDisable can correctly appear within
     a LocationMatch. [Graham Leggett]

  *) mod_cache: Fix the moving of the CACHE filter, which erroneously
     stood down if the original filter was not added by configuration.
     [Graham Leggett]

  *) mod_ssl: improve certificate error logging. PR 47408. [Kaspar Brand]

  *) mod_authz_groupfile: Increase length limit of lines in the group file to
     16MB. PR 43084. [Stefan Fritsch]

  *) core: Increase length limit of lines in the configuration file to 16MB.
     PR 45888. PR 50824. [Stefan Fritsch]

  *) core: Add API for resizable buffers. [Stefan Fritsch]

  *) mod_ldap: Enable LDAPConnectionTimeout for LDAP toolkits that have
     LDAP_OPT_CONNECT_TIMEOUT instead of LDAP_OPT_NETWORK_TIMEOUT, such
     as Tivoli Directory Server 6.3 and later. [Eric Covener]

  *) mod_ldap: Change default number of retries from 10 to 3, and add
     an LDAPRetries and LDAPRetryDelay directives. [Eric Covener]

  *) mod_authnz_ldap: Don't retry during authentication, because this just
     multiplies the ample retries already being done by mod_ldap. [Eric Covener]

  *) configure: Allow to explicitly disable modules even with module selection
     'reallyall'. [Stefan Fritsch]

  *) mod_rewrite: Check validity of each internal (int:) RewriteMap even if the
     RewriteEngine is disabled in server context, avoiding a crash while
     referencing the invalid int: map at runtime. PR 50994.
     [Ben Noordhuis <info noordhuis nl>]

  *) mod_ssl, configure: require OpenSSL 0.9.7 or later. [Kaspar Brand]

  *) mod_ssl: remove ssl_toolkit_compat layer. [Kaspar Brand]

  *) mod_ssl, configure, ab: drop support for RSA BSAFE SSL-C toolkit.
     [Kaspar Brand]

  *) mod_usertrack: Run mod_usertrack earlier in the fixups hook to ensure the
     cookie is set when modules such as mod_rewrite trigger a redirect. Also
     use r->err_headers_out for the cookie, for the same reason.  PR29755.
     [Sami J. Mäkinen <sjm almamedia fi>, Eric Covener]

  *) mod_proxy_http, mod_proxy_connect: Add 'proxy-status' and
     'proxy-source-port' request notes for logging. PR 30195. [Stefan Fritsch]

  *) configure: Enable ldap modules in 'all' and 'most' selections if ldap
     is compiled into apr-util. [Stefan Fritsch]

  *) core: Add ap_check_cmd_context()-check if a command is executed in
     .htaccess file. [Stefan Fritsch]

  *) mod_deflate: Fix endless loop if first bucket is metadata. PR 51590.
     [Torsten Foertsch <torsten foertsch gmx net>]

  *) mod_authn_socache: Fix to work in .htaccess if not configured anywhere
     in httpd.conf, and introduce an AuthnCacheEnable directive.
     PR 51991 [Nick Kew]

  *) mod_xml2enc: new (formerly third-party) module supporting
     internationalisation for filters via smart charset sniffing
     and conversion. [Nick Kew]

  *) mod_proxy_html: new (formerly third-party) module to fix up
     HTML links in a reverse proxy situation, where a backend
     generates URLs that are not resolvable by Clients. [Nick Kew]

Changes with Apache 2.3.14

  *) mod_proxy_ajp: Improve trace logging.  [Rainer Jung]

  *) mod_proxy_ajp: Respect "reuse" flag in END_REPONSE packets.
     [Rainer Jung]

  *) mod_proxy: enable absolute URLs to be rewritten with ProxyPassReverse,
     e.g. to reverse proxy "Location: https://other-internal-server/login"
     [Nick Kew]

  *) prefork, worker, event: Make sure crashes are logged to the error log if
     httpd has already detached from the console. [Stefan Fritsch]

  *) prefork, worker, event: Reduce period during startup/restart where a
     successive signal may be lost. PR 43696. [Arun Bhalla <arun shme net>]

  *) mod_allowmethods: Correct Merging of "reset" and do not allow an
     empty parameter list for the AllowMethods directive. [Rainer Jung]

  *) configure: Update selection of modules for 'all' and 'most'. 'all' will
     now enable all modules except for example and test modules. Make the
     selection for 'most' more useful (including ssl and proxy). Both 'all'
     and 'most' will now disable modules if dependencies are missing instead
     of aborting. If a specific module is requested with --enable-XXX=yes,
     missing dependencies will still cause configure to exit with an error.
     [Stefan Fritsch]

  *) mod_ldap: Revert the integration of apr-ldap as ap_ldap which was done
     in 2.3.13. [Stefan Fritsch]

  *) core: For '*' or '_default_' vhosts, use a wildcard address of any
     address family, rather than IPv4 only.  [Joe Orton]

  *) core, mod_rewrite, mod_ssl, mod_nw_ssl: Make the SERVER_NAME variable
     include [ ] for literal IPv6 addresses, as mandated by RFC 3875.
     PR 26005. [Stefan Fritsch]

  *) mod_negotiation: Fix parsing of Content-Length in type maps. PR 42203.
     [Nagae Hidetake <nagae eagan jp>]

  *) core: Add more logging to ap_scan_script_header_err* functions. Add
     ap_scan_script_header_err*_ex functions that take a module index for
     logging.
     mod_cgi, mod_cgid, mod_proxy_fcgi, mod_proxy_scgi, mod_isapi: Use the
     new functions in order to make logging configurable per-module.
     [Stefan Fritsch]

  *) mod_dir: Add DirectoryIndexRedirect to send an external redirect to
     the proper index.  [Eric Covener]

  *) mod_deflate: Don't try to compress requests with a zero sized body.
     PR 51350. [Stefan Fritsch]

  *) core: Fix startup on IPv6-only systems. PR 50592. [Joe Orton,
     <root linkage white-void net>]

  *) suexec: Add environment variables CONTEXT_DOCUMENT_ROOT, CONTEXT_PREFIX,
     REDIRECT_ERROR_NOTES, REDIRECT_SCRIPT_FILENAME, REQUEST_SCHEME to the
     whitelist in suexec. PR 51499. [Graham Laverty <graham reg ca>,
     Stefan Fritsch]

  *) mod_rewrite: Fix regexp RewriteCond with NoCase. [Stefan Fritsch]

  *) mod_log_debug: New module that allows to log custom messages at various
     phases in the request processing. [Stefan Fritsch]

  *) mod_ssl: Add some debug logging when loading server certificates.
     PR 37912. [Nick Burch <nick burch alfresco com>]

  *) configure: Support reallyall option also for --enable-mods-static.
     [Rainer Jung]

  *) mod_socache_dc: add --with-distcache to configure for choosing
     the distcache installation directory. [Rainer Jung]

  *) mod_socache_dc: use correct build variable MOD_SOCACHE_DC_LDADD
     instead of MOD_SOCACHE_LDADD in build macro. [Rainer Jung]

  *) mod_lua, mod_deflate: respect platform specific runpath linker
     flag. [Rainer Jung]

  *) configure: Only link the httpd binary against PCRE. No other support
     binary needs PCRE. [Rainer Jung]

  *) configure: tolerate dependency checking failures for modules if
     they have been enabled implicitly. [Rainer Jung]

  *) configure: Allow to specify module specific custom linker flags via
     the MOD_XXX_LDADD variables. [Rainer Jung]

Changes with Apache 2.3.13

  *) ab: Support specifying the local address to use. PR 48930.
     [Peter Schuller <scode spotify com>]

  *) core: Add support to ErrorLogFormat for logging the system unique
     thread id under Linux. [Stefan Fritsch]

  *) event: New AsyncRequestWorkerFactor directive to influence how many
     connections will be accepted per process. [Stefan Fritsch]

  *) prefork, worker, event: Rename MaxClients to MaxRequestWorkers which
     describes more accurately what it does. [Stefan Fritsch]

  *) rotatelogs: Add -p argument to specify custom program to invoke
     after a log rotation.  PR 51285. [Sven Ulland <sveniu ifi.uio.no>,
     Joe Orton]

  *) mod_ssl: Don't do OCSP checks for valid self-issued certs. [Kaspar Brand]

  *) mod_ssl: Avoid unnecessary renegotiations with SSLVerifyDepth 0.
     PR 48215. [Kaspar Brand]

  *) mod_status: Display information about asynchronous connections in the
     server-status. PR 44377. [Stefan Fritsch]

  *) mpm_event: If the number of connections of a process is very high, or if
     all workers are busy, don't accept new connections in that process.
     [Stefan Fritsch]

  *) mpm_event: Process lingering close asynchronously instead of tying up
     worker threads. [Jeff Trawick, Stefan Fritsch]

  *) mpm_event: If MaxMemFree is set, limit the number of pools that is kept
     around. [Stefan Fritsch]

  *) mpm_event: Fix graceful restart aborting connections. PR 43359.
     [Takashi Sato <takashi lans-tv com>]

  *) mod_ssl: Disable AECDH ciphers in example config. PR 51363.
     [Rob Stradling <rob comodo com>]

  *) core: Introduce new function ap_get_conn_socket() to access the socket of
     a connection. [Stefan Fritsch]

  *) mod_data: Introduce a filter to support RFC2397 data URLs. [Graham
     Leggett]

  *) mod_userdir/mod_alias/mod_vhost_alias: Correctly set DOCUMENT_ROOT,
     CONTEXT_DOCUMENT_ROOT, CONTEXT_PREFIX. PR 26052. PR 46198.
     [Stefan Fritsch]

  *) core: Allow to override document_root on a per-request basis. Introduce
     new context_document_root and context_prefix which provide information
     about non-global URI-to-directory mappings (from e.g. mod_userdir or
     mod_alias) to scripts. PR 49705. [Stefan Fritsch]

  *) core: Add <ElseIf> and <Else> to complement <If> sections.
     [Stefan Fritsch]

  *) mod_ext_filter: Remove DebugLevel option in favor of per-module loglevel.
     [Stefan Fritsch]

  *) mod_include: Make the "#if expr" element use the new "ap_expr" expression
     parser. The old parser can still be used by setting the new directive
     SSILegacyExprParser. [Stefan Fritsch]

  *) core: Add some features to ap_expr for use by mod_include: a restricted
     mode that does not allow to bypass request access restrictions; new
     variables DOCUMENT_URI (alias for REQUEST_URI), LAST_MODIFIED; -A as an
     alias for -U; an additional data entry in ap_expr_eval_ctx_t for use by
     the consumer; an extensible ap_expr_exec_ctx() API that allows to use that
     data entry. [Stefan Fritsch]

  *) mod_include: Merge directory configs instead of one SSI* config directive
     causing all other per-directory SSI* config directives to be reset.
     [Stefan Fritsch]

  *) mod_charset_lite: Remove DebugLevel option in favour of per-module
     loglevel. [Stefan Fritsch]

  *) core: Add ap_regexec_len() function that works with non-null-terminated
     strings. PR 51231. [Yehezkel Horowitz <horowity checkpoint com>]

  *) mod_authnz_ldap: If the LDAP server returns constraint violation,
     don't treat this as an error but as "auth denied". [Stefan Fritsch]

  *) mod_proxy_fcgi|scgi: Add support for "best guess" of PATH_INFO
     for SCGI/FCGI. PR 50880, 50851. [Mark Montague <mark catseye.org>,
     Jim Jagielski]

  *) mod_cache: When content is served stale, and there is no means to
     revalidate the content using ETag or Last-Modified, and we have
     mandated no stale-on-error behaviour, stand down and don't cache.
     Saves a cache write that will never be read.
     [Graham Leggett]

  *) mod_reqtimeout: Fix a timed out connection going into the keep-alive
     state after a timeout when discarding a request body. PR 51103.
     [Stefan Fritsch]

  *) core: Add various file existence test operators to ap_expr.
     [Stefan Fritsch]

  *) mod_proxy_express: New mass reverse-proxy switch extension for
     mod_proxy. [Jim Jagielski]

  *) configure: Fix script error when configuring module set "reallyall".
     [Rainer Jung]

Changes with Apache 2.3.12

  *) configure, core: Provide easier support for APR's hook probe
     capability. [Jim Jagielski, Jeff Trawick]

  *) Silence autoconf 2.68 warnings.  [Rainer Jung]

  *) mod_authnz_ldap: Resolve crash when LDAP is used for authorization only
     [Scott Hill <shill genscape.com>]

  *) support: Make sure check_forensic works with mod_unique_id loaded
     [Joe Schaefer]

  *) Add child_status hook for tracking creation/termination of MPM child
     processes.  Add end_generation hook for notification when the last
     MPM child of a generation exits. [Jeff Trawick]

  *) mod_ldap: Make LDAPSharedCacheSize 0 create a non-shared-memory cache per
     process as opposed to disabling caching completely. This allows to use
     the non-shared-memory cache as a workaround for the shared memory cache
     not being available during graceful restarts. PR 48958. [Stefan Fritsch]

  *) Add new ap_reserve_module_slots/ap_reserve_module_slots_directive API,
     necessary if a module (like mod_perl) registers additional modules late
     in the startup phase. [Stefan Fritsch]

  *) core: Prevent segfault if DYNAMIC_MODULE_LIMIT is reached. PR 51072.
     [Torsten Förtsch <torsten foertsch gmx net>]

  *) WinNT MPM: Improve robustness under heavy load.  [Jeff Trawick]

  *) MinGW build improvements.  PR 49535.  [John Vandenberg
     <jayvdb gmail.com>, Jeff Trawick]

  *) core: Support module names with colons in loglevel configuration.
     [Torsten Förtsch <torsten foertsch gmx net>]

  *) mod_ssl, ab: Support OpenSSL compiled without SSLv2 support.
     [Stefan Fritsch]

  *) core: Abort if the MPM is changed across restart.  [Jeff Trawick]

  *) mod_proxy_ajp: Add support for 'ProxyErrorOverride on'. PR 50945.
     [Peter Pramberger <peter pramberger.at>, Jim Jagielski]

  *) mod_proxy_fcgi: Add support for 'ProxyErrorOverride on'. PR 50913.
     [Mark Montague <mark catseye.org>, Jim Jagielski]

  *) core: Change the APIs of ap_cfg_getline() and ap_cfg_getc() to return an
     error code. Abort with a nice error message if a config line is too long.
     Partial fix for PR 50824. [Stefan Fritsch]

  *) mod_info: Dump config to stdout during startup if -DDUMP_CONFIG is
     specified. PR 31956. [Stefan Fritsch]

  *) Restore visibility of DEFAULT_PIDLOG to core and modules.  MPM
     helper function ap_remove_pid() added.  [Jeff Trawick]

  *) Enable DEFAULT_REL_RUNTIMEDIR on Windows and NetWare.  [various]

  *) Correct C++ incompatibility with http_log.h.  [Stefan Fritsch, Jeff
     Trawick]

  *) mod_log_config: Prevent segfault. PR 50861. [Torsten Förtsch
     <torsten.foertsch gmx.net>]

  *) core: AllowEncodedSlashes new option NoDecode to allow encoded slashes
     in request URL path info but not decode them. Change behavior of option
     "On" to decode the encoded slashes as 2.0 and 2.2 do.  PR 35256,
     PR 46830.  [Dan Poirier]

  *) mod_ssl: Check SNI hostname against Host header case-insensitively.
     PR 49491.  [Mayank Agrawal <magrawal.08 gmail.com>]

  *) mod_ldap: Add LDAPConnectionPoolTTL to give control over lifetime
     of bound backend LDAP connections.  PR47634 [Eric Covener]

  *) mod_cache: Make CacheEnable and CacheDisable configurable per
     directory in addition to per server, making them work from within
     a LocationMatch. [Graham Leggett]

  *) worker, event, prefork: Correct several issues when built as
     DSOs; most notably, the scoreboard was reinitialized during graceful
     restart, such that processes of the previous generation were not
     observable.  [Jeff Trawick]

Changes with Apache 2.3.11

  *) mod_win32: Added shebang check for '! so that .vbs scripts work as CGI.
     Win32's cscript interpreter can only use a single quote as comment char.
     [Guenter Knauf]

  *) mod_proxy: balancer-manager now uses POST instead of GET.
     [Jim Jagielski]

  *) core: new util function: ap_parse_form_data(). Previously,
     this capability was tucked away in mod_request. [Jim Jagielski]

  *) core: new hook: ap_run_pre_read_request. [Jim Jagielski]

  *) modules: Fix many modules that were not correctly initializing if they
     were not active during server startup but got enabled later during a
     graceful restart. [Stefan Fritsch]

  *) core: Create new ap_state_query function that allows modules to determine
     if the current configuration run is the initial one at server startup,
     and if the server is started for testing/config dumping only.
     [Stefan Fritsch]

  *) mod_proxy: Runtime configuration of many parameters for existing
     balancers via the balancer-manager. [Jim Jagielski]

  *) mod_proxy: Runtime addition of new workers (BalancerMember) for existing
     balancers via the balancer-manager. [Jim Jagielski]

  *) mod_cache: When a bad Expires date is present, we need to behave as if
     the Expires is in the past, not as if the Expires is missing. PR 16521.
     [Co-Advisor <coad measurement-factory.com>]

  *) mod_cache: We must ignore quoted-string values that appear in a
     Cache-Control header. PR 50199. [Graham Leggett]

  *) mod_dav: Revert change to send 501 error if unknown Content-* header is
    received for a PUT request. PR 42978. [Stefan Fritsch]

  *) mod_cache: Respect s-maxage as described by RFC2616 14.9.3, which must
     take precedence if present. PR 35247. [Graham Leggett]

  *) mod_ssl: Fix a possible startup failure if multiple SSL vhosts
     are configured with the same ServerName and private key file.
     [Masahiro Matsuya <mmatsuya redhat.com>, Joe Orton]

  *) mod_socache_dc: Make module compile by fixing some typos.
     PR 50735 [Mark Montague <mark catseye.org>]

  *) prefork: Update MPM state in children during a graceful stop or
     restart.  PR 41743.  [Andrew Punch <andrew.punch 247realmedia.com>]

  *) mod_mime: Ignore leading dots when looking for mime extensions.
     PR 50434 [Stefan Fritsch]

  *) core: Add support to set variables with the 'Define' directive. The
     variables that can then be used in the config using the ${VAR} syntax
     known from envvar interpolation. [Stefan Fritsch]

  *) mod_proxy_http: make adding of X-Forwarded-* headers configurable.
     ProxyAddHeaders defaults to On. [Vincent Deffontaines]

  *) mod_slotmem_shm: Increase memory alignment for slotmem data.
     [Rainer Jung]

  *) mod_ssl: Add config options for OCSP: SSLOCSPResponderTimeout,
     SSLOCSPResponseMaxAge, SSLOCSPResponseTimeSkew.
     [Kaspar Brand <httpd-dev.2011 velox.ch>]

  *) mod_ssl: Revamp output buffering to reduce network overhead for
     output fragmented into many buckets, such as chunked HTTP responses.
     [Joe Orton]

  *) core: Apply <If> sections to all requests, not only to file base requests.
     Allow to use <If> inside <Directory>, <Location>, and <Files> sections.
     The merging of <If> sections now happens after the merging of <Location>
     sections, even if an <If> section is embedded inside a <Directory> or
     <Files> section.  [Stefan Fritsch]

  *) mod_proxy: Refactor usage of shared data by dropping the scoreboard
     and using slotmem. Create foundation for dynamic growth/changes of
     members within a balancer. Remove BalancerNonce in favor of a
     per-balancer 'nonce' parameter. [Jim Jagielski]

  *) mod_status: Don't show slots which are disabled by MaxClients as open.
     PR 47022 [Jordi Prats <jordi prats gmail com>, Stefan Fritsch]

  *) mpm_prefork: Fix ap_mpm_query results for AP_MPMQ_MAX_DAEMONS and
     AP_MPMQ_MAX_THREADS.

  *) mod_authz_core: Fix bug in merging logic if user-based and non-user-based
     authorization directives were mixed. [Stefan Fritsch]

  *) mod_authn_socache: change directive name from AuthnCacheProvider
     to AuthnCacheProvideFor.  The term "provider" is overloaded in
     this module, and we should avoid confusion between the provider
     of a backend (AuthnCacheSOCache) and the authn provider(s) for
     which this module provides cacheing (AuthnCacheProvideFor).
     [Nick Kew]

  *) mod_proxy_http: Allocate the fake backend request from a child pool
     of the backend connection, instead of misusing the pool of the frontend
     request. Fixes a thread safety issue where buckets set aside in the
     backend connection leak into other threads, and then disappear when
     the frontend request is cleaned up, in turn causing corrupted buckets
     to make other threads spin. [Graham Leggett]

  *) mod_ssl: Change the format of the SSL_{CLIENT,SERVER}_{I,S}_DN variables
     to be RFC 2253 compatible, convert non-ASCII characters to UTF8, and
     escape other special characters with backslashes. The old format can
     still be used with the LegacyDNStringFormat argument to SSLOptions.

  *) core, mod_rewrite: Make the REQUEST_SCHEME variable available to
     scripts and mod_rewrite. [Stefan Fritsch]

  *) mod_rewrite: Allow to use arbitrary boolean expressions (ap_expr) in
     RewriteCond. [Stefan Fritsch]

  *) mod_rewrite: Allow to unset environment variables using E=!VAR.
     PR 49512. [Mark Drayton <mark markdrayton info>, Stefan Fritsch]

  *) mod_headers: Restore the 2.3.8 and earlier default for the first
     argument of the Header directive ("onsuccess").  [Eric Covener]

  *) core: Disallow the mixing of relative and absolute Options PR 33708.
     [Sönke Tesch <st kino-fahrplan.de>]

  *) core: When exporting request headers to HTTP_* environment variables,
     drop variables whose names contain invalid characters. Describe in the
     docs how to restore the old behaviour. [Malte S. Stretz <mss apache org>]

  *) core: When selecting an IP-based virtual host, favor an exact match for
     the port over a wildcard (or omitted) port instead of favoring the one
     that came first in the configuration file. [Eric Covener]

  *) core: Overlapping virtual host address/port combinations  now implicitly
     enable name-based virtual hosting for that address.  The NameVirtualHost
     directive has no effect, and _default_ is interpreted the same as "*".
     [Eric Covener]

  *) core: In the absence of any Options directives, the default is now
     "FollowSymlinks" instead of "All".  [Igor Galić]

  *) rotatelogs: Add -e option to write logs through to stdout for optional
     further processing. [Graham Leggett]

  *) mod_ssl: Correctly read full lines in input filter when the line is
     incomplete during first read. PR 50481. [Ruediger Pluem]

  *) mod_authz_core: Add AuthzSendForbiddenOnFailure directive to allow
     sending '403 FORBIDDEN' instead of '401 UNAUTHORIZED' if authorization
     fails for an authenticated user. PR 40721. [Stefan Fritsch]

Changes with Apache 2.3.10

  *) mod_rewrite: Don't implicitly URL-escape the original query string
     when no substitution has changed it. PR 50447. [Eric Covener]

  *) core: Honor 'AcceptPathInfo OFF' during internal redirects,
     such as per-directory mod_rewrite substitutions.  PR 50349.
     [Eric Covener]

  *) mod_rewrite: Add 'RewriteOptions InheritBefore' to put the base
     rules/conditions before the overridden rules/conditions.  PR 39313.
     [Jérôme Grandjanny <jerome.grandjanny cea.fr>]

  *) mod_autoindex: add IndexIgnoreReset to reset the list of IndexIgnored
     filenames in higher precedence configuration sections.  PR 24243.
     [Eric Covener]

  *) mod_cgid: RLimit* directive support for mod_cgid.  PR 42135
     [Eric Covener]

  *) core: Fail startup when the argument to ServerName looks like a glob
     or a regular expression instead of a hostname (*?[]).  PR 39863
     [Rahul Nair <rahul.g.nair gmail.com>]

  *) mod_userdir: Add merging of enable, disable, and filename arguments
     to UserDir directive, leaving enable/disable of userlists unmerged.
     PR 44076 [Eric Covener]

  *) httpd: When no -k option is provided on the httpd command line, the server
     was starting without checking for an existing pidfile.  PR 50350
     [Eric Covener]

  *) mod_proxy: Put the worker in error state if the SSL handshake with the
     backend fails. PR 50332.
     [Daniel Ruggeri <DRuggeri primary.net>, Ruediger Pluem]

  *) mod_cache_disk: Fix Windows build which was broken after renaming
     the module. [Gregg L. Smith]

Changes with Apache 2.3.9

  *) SECURITY: CVE-2010-1623 (cve.mitre.org)
     Fix a denial of service attack against mod_reqtimeout.
     [Stefan Fritsch]

  *) mod_headers: Change default first argument of Header directive
     from "onsuccess" to "always". [Eric Covener]

  *) mod_include: Add the onerror attribute to the include element,
     allowing an URL to be specified to include on error. [Graham
     Leggett]

  *) mod_cache_disk: mod_disk_cache renamed to mod_cache_disk, to be
     consistent with the naming of other modules. [Graham Leggett]

  *) mod_setenvif: Add SetEnvIfExpr directive to set env var depending on
     expression. [Stefan Fritsch]

  *) mod_proxy: Fix ProxyPassInterpolateEnv directive. PR 50292.
     [Stefan Fritsch]

  *) suEXEC: Add Suexec directive to disable suEXEC without renaming the
     binary (Suexec Off), or force startup failure if suEXEC is required
     but not supported (Suexec On).  Change SuexecUserGroup to fail
     startup instead of just printing a warning if suEXEC is disabled.
     [Jeff Trawick]

  *) core: Add Error directive for aborting startup or htaccess processing
     with a specified error message.  [Jeff Trawick]

  *) mod_rewrite: Fix the RewriteEngine directive to work within a
     location. Previously, once RewriteEngine was switched on globally,
     it was impossible to switch off. [Graham Leggett]

  *) core, mod_include, mod_ssl: Move the expression parser derived from
     mod_include back into mod_include. Replace ap_expr with a parser
     derived from mod_ssl's parser. Make mod_ssl use the new parser. Rework
     ap_expr's public interface and provide hooks for modules to add variables
     and functions. [Stefan Fritsch]

  *) core: Do the hook sorting earlier so that the hooks are properly sorted
     for the pre_config hook and during parsing the config. [Stefan Fritsch]

  *) core: In the absence of any AllowOverride directives, the default is now
     "None" instead of "All".  PR49823 [Eric Covener]

  *) mod_proxy: Don't allow ProxyPass or ProxyPassReverse in
     <Directory> or <Files>. PR47765 [Eric Covener]

  *) prefork/worker/event MPMS: default value (when no directive is present)
     of MaxConnectionsPerChild/MaxRequestsPerChild is changed to 0 from 10000
     to match default configuration and manual. PR47782 [Eric Covener]

  *) proxy_connect: Don't give up in the middle of a CONNECT tunnel
     when the child process is starting to exit.  PR50220. [Eric Covener]

  *) mod_autoindex: Fix inheritance of mod_autoindex directives into
     contexts that don't have any mod_autoindex directives. PR47766.
     [Eric Covener]

  *) mod_rewrite: Add END flag for RewriteRule to prevent further rounds
     of rewrite processing when a per-directory substitution occurs.
     [Eric Covener]

  *) mod_ssl: Make sure to always log an error if loading of CA certificates
     fails. PR 40312. [Paul Tiemann <issues apache org ourdetour com>]

  *) mod_dav: Send 501 error if unknown Content-* header is received for a PUT
     request (RFC 2616 9.6). PR 42978. [Stefan Fritsch]

  *) mod_dav: Send 400 error if malformed Content-Range header is received for
     a put request (RFC 2616 14.16). PR 49825. [Stefan Fritsch]

  *) mod_proxy: Release the backend connection as soon as EOS is detected,
     so the backend isn't forced to wait for the client to eventually
     acknowledge the data. [Graham Leggett]

  *) mod_proxy: Optimise ProxyPass within a Location so that it is stored
     per-directory, and chosen during the location walk. Make ProxyPass
     work correctly from within a LocationMatch. [Graham Leggett]

  *) core: Fix segfault if per-module LogLevel is on virtual host
     scope. PR 50117. [Stefan Fritsch]

  *) mod_proxy: Move the ProxyErrorOverride directive to have per
     directory scope. [Graham Leggett]

  *) mod_allowmethods: New module to deny certain HTTP methods without
     interfering with authentication/authorization. [Paul Querna,
     Igor Galić, Stefan Fritsch]

  *) mod_ssl: Log certificate information and improve error message if client
     cert verification fails. PR 50093, PR 50094. [Lassi Tuura <lat cern ch>,
     Stefan Fritsch]

  *) htcacheclean: Teach htcacheclean to limit cache size by number of
     inodes in addition to size of files. Prevents a cache disk from
     running out of space when many small files are cached.
     [Graham Leggett]

  *) core: Rename MaxRequestsPerChild to MaxConnectionsPerChild, which
     describes more accurately what the directive does. The old name
     still works but logs a warning. [Stefan Fritsch]

  *) mod_cache: Optionally serve stale data when a revalidation returns a
     5xx response, controlled by the CacheStaleOnError directive.
     [Graham Leggett]

  *) htcacheclean: Allow the listing of valid URLs within the cache, with
     the option to list entry metadata such as sizes and times. [Graham
     Leggett]

  *) mod_cache: correctly parse quoted strings in cache headers.
     PR 50199 [Nick Kew]

  *) mod_cache: Allow control over the base URL of reverse proxied requests
     using the CacheKeyBaseURL directive, so that the cache key can be
     calculated from the endpoint URL instead of the server URL. [Graham
     Leggett]

  *) mod_cache: CacheLastModifiedFactor, CacheStoreNoStore, CacheStorePrivate,
     CacheStoreExpired, CacheIgnoreNoLastMod, CacheDefaultExpire,
     CacheMinExpire and CacheMaxExpire can be set per directory/location.
     [Graham Leggett]

  *) mod_disk_cache: CacheMaxFileSize, CacheMinFileSize, CacheReadSize and
     CacheReadTime can be set per directory/location. [Graham Leggett]

  *) core: Speed up config parsing if using a very large number of config
     files. PR 50002 [andrew cloudaccess net]

  *) mod_cache: Support the caching of HEAD requests. [Graham Leggett]

  *) htcacheclean: Allow the option to round up file sizes to a given
     block size, improving the accuracy of disk usage. [Graham Leggett]

  *) mod_ssl: Add authz providers for use with mod_authz_core and its
     RequireAny/RequireAll containers: 'ssl' (equivalent to SSLRequireSSL),
     'ssl-verify-client' (for use with 'SSLVerifyClient optional'), and
     'ssl-require' (expressions with same syntax as SSLRequire).
     [Stefan Fritsch]

  *) mod_ssl: Make the ssl expression parser thread-safe. It now requires
     bison instead of yacc. [Stefan Fritsch]

  *) mod_disk_cache: Change on-disk header file format to support the
     link of the device/inode of the data file to the matching header
     file, and to support the option of not writing a data file when
     the data file is empty. [Graham Leggett]

  *) core/mod_unique_id: Add generate_log_id hook to allow to use
     the ID generated by mod_unique_id as error log ID for requests.
     [Stefan Fritsch]

  *) mod_cache: Make sure that we never allow a 304 Not Modified response
     that we asked for to leak to the client should the 304 response be
     uncacheable. PR45341 [Graham Leggett]

  *) mod_cache: Add the cache_status hook to register the final cache
     decision hit/miss/revalidate. Add optional support for an X-Cache
     and/or an X-Cache-Detail header to add the cache status to the
     response. PR48241 [Graham Leggett]

  *) mod_authz_host: Add 'local' provider that matches connections originating
     on the local host. PR 19938. [Stefan Fritsch]

  *) Event MPM: Fix crash accessing pollset on worker thread when child
     process is exiting.  [Jeff Trawick]

  *) core: For process invocation (cgi, fcgid, piped loggers and so forth)
     pass the system library path (LD_LIBRARY_PATH or platform-specific
     variables) along with the system PATH, by default.  Both should be
     overridden together as desired using PassEnv etc; see mod_env.
     [William Rowe]

  *) mod_cache: Introduce CacheStoreExpired, to allow administrators to
     capture a stale backend response, perform If-Modified-Since requests
     against the backend, and serving from the cache all 304 responses.
     This restores pre-2.2.4 cache behavior.  [William Rowe]

  *) mod_rewrite: Introduce <=, >= string comparison operators, and integer
     comparators -lt, -le, -eq, -ge, and -gt.  To help bash users and drop
     the ambiguity of the symlink test "-ltest", introduce -h or -L as
     symlink test operators.  [William Rowe]

  *) mod_cache: Give the cache provider the opportunity to choose to cache
     or not cache based on the buckets present in the brigade, such as the
     presence of a FILE bucket.
     [Graham Leggett]

  *) mod_authz_core: Allow authz providers to check args while reading the
     config and allow to cache parsed args. Move 'all' and 'env' authz
     providers from mod_authz_host to mod_authz_core. Add 'method' authz
     provider depending on the HTTP method.  [Stefan Fritsch]

  *) mod_include: Move the request_rec within mod_include to be
     exposed within include_ctx_t. [Graham Leggett]

  *) mod_include: Reinstate support for UTF-8 character sets by allowing a
     variable being echoed or set to be decoded and then encoded as separate
     steps. PR47686 [Graham Leggett]

  *) mod_cache: Add a discrete commit_entity() provider function within the
     mod_cache provider interface which is called to indicate to the
     provider that caching is complete, giving the provider the opportunity
     to commit temporary files permanently to the cache in an atomic
     fashion. Replace the inconsistent use of error cleanups with a formal
     set of pool cleanups attached to a subpool, which is destroyed on error.
     [Graham Leggett]

  *) mod_cache: Change the signature of the store_body() provider function
     within the mod_cache provider interface to support an "in" brigade
     and an "out" brigade instead of just a single input brigade. This
     gives a cache provider the option to consume only part of the brigade
     passed to it, rather than the whole brigade as was required before.
     This fixes an out of memory and a request timeout condition that would
     occur when the original document was a large file. Introduce