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Changes with Apache 2.3.14

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

  *) core: Fix startup on IP6-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 implicitely. [Rainer Jung]

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

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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
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     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]

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  *) 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 existance 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]
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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.
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