CHANGES

  *) mod_ssl: Remove the hardcoded algorithm-type dependency for the
     SSLCertificateFile and SSLCertificateKeyFile directives, to enable
     future algorithm agility, and deprecate the SSLCertificateChainFile
     directive (obsoleted by SSLCertificateFile). [Kaspar Brand]

  *) mod_rewrite: Add RewriteOptions InheritDown, InheritDownBefore, 
     and IgnoreInherit to allow RewriteRules to be pushed from parent scopes
     to child scopes without explicitly configuring each child scope.
     PR56153.  [Edward Lu <Chaosed0 gmail com>] 

  *) prefork: Fix long delays when doing a graceful restart.
     PR 54852 [Jim Jagielski, Arkadiusz Miskiewicz <arekm maven pl>]

  *) FreeBSD: Disable IPv4-mapped listening sockets by default for versions
     5+ instead of just for FreeBSD 5. PR 53824. [Jeff Trawick]

  *) mod_proxy_wstunnel: Avoid busy loop on client errors, drop message
     IDs 02445, 02446, and 02448 to TRACE1 from DEBUG. PR 56145.
     [Joffroy Christen <joffroy.christen solvaxis com>, Eric Covener]

  *) mod_remoteip: Correct the trusted proxy match test. PR 54651.
     [Yoshinori Ehara <yoshinori ehara gmail com>, Eugene L <eugenel amazon com>]

  *) mod_proxy_fcgi: Fix error message when an unexpected protocol version
     number is received from the application.  PR 56110.  [Jeff Trawick]

  *) mod_remoteip: Use the correct IP addresses to populate the proxy_ips field.
     PR 55972. [Mike Rumph]

  *) mod_lua: Update r:setcookie() to accept a table of options and add domain,
     path and httponly to the list of options available to set.
     PR 56128 [Edward Lu <Chaosed0 gmail com>, Daniel Gruno]

  *) mod_lua: Fix r:setcookie() to add, rather than replace,
     the Set-Cookie header. PR56105
     [Kevin J Walters <kjw ms com>, Edward Lu <Chaosed0 gmail com>]

  *) mod_lua: Allow for database results to be returned as a hash with 
     row-name/value pairs instead of just row-number/value. [Daniel Gruno]

  *) mod_rewrite: Add %{CONN_REMOTE_ADDR} as the non-useragent counterpart to
     %{REMOTE_ADDR}. PR 56094. [Edward Lu <Chaosed0 gmail com>]

  *) WinNT MPM: If ap_run_pre_connection() fails or sets c->aborted, don't
     save the socket for reuse by the next worker as if it were an 
     APR_SO_DISCONNECTED socket. Restores 2.2 behavior. [Eric Covener]

  *) mod_dir: Don't search for a DirectoryIndex or DirectorySlash on a URL
     that was just rewritten by mod_rewrite. PR53929. [Eric Covener]

  *) mod_session: When we have a session we were unable to decode,
     behave as if there was no session at all. [Thomas Eckert
     <thomas.r.w.eckert gmail com>]

  *) mod_session: Fix problems interpreting the SessionInclude and
     SessionExclude configuration. PR 56038. [Erik Pearson
     <erik adaptations.com>]

  *) mod_authn_core: Allow <AuthnProviderAlias>'es to be seen from auth
     stanzas under virtual hosts. PR 55622. [Eric Covener]

  *) mod_proxy_fcgi: Use apr_socket_timeout_get instead of hard-coded
     30 seconds timeout. [Jan Kaluza]

  *) build: only search for modules (config*.m4) in known subdirectories, see
     build/config-stubs. [Stefan Fritsch]

  *) mod_cache_disk: Fix potential hangs on Windows when using mod_cache_disk. 
     PR 55833. [Eric Covener]

  *) mod_ssl: Add support for OpenSSL configuration commands by introducing
     the SSLOpenSSLConfCmd directive. [Stephen Henson, Kaspar Brand]

  *) mod_proxy: Remove (never documented) <Proxy ~ wildcard-url> syntax which
     is equivalent to <ProxyMatch wildcard-url>. [Christophe Jaillet]

  *) mod_authz_user, mod_authz_host, mod_authz_groupfile, mod_authz_dbm,
     mod_authz_dbd, mod_authnz_ldap: Support the expression parser within the
     require directives. [Graham Leggett]

  *) mod_proxy_http: Core dumped under high load. PR 50335.
     [Jan Kaluza <jkaluza redhat.com>]

  *) mod_socache_shmcb.c: Remove arbitrary restriction on shared memory size
     previously limited to 64MB. [Jens Låås <jelaas gmail.com>]

  *) mod_lua: Use binary copy when dealing with uploads through r:parsebody() 
     to prevent truncating files. [Daniel Gruno]

Changes with Apache 2.4.7

  *) SECURITY: CVE-2013-4352 (cve.mitre.org)
     mod_cache: Fix a NULL pointer deference which allowed untrusted
     origin servers to crash mod_cache in a forward proxy
     configuration.  [Graham Leggett]

  *) APR 1.5.0 or later is now required for the event MPM.

  *) slotmem_shm: Error detection. [Jim Jagielski]

  *) event: Use skiplist data structure. [Jim Jagielski]

  *) event: Fail at startup with message AP02405 if the APR atomic
     implementation is not compatible with the MPM.  [Jim Jagielski]

  *) mpm_unix: Add ap_mpm_podx_* implementation to avoid code duplication
     and align w/ trunk. [Jim Jagielski]

  *) Fix potential rejection of valid MaxMemFree and ThreadStackSize
     directives.  [Mike Rumph <mike.rumph oracle.com>]

  *) mod_proxy_fcgi: Remove 64K limit on encoded length of all envvars.
     An individual envvar with an encoded length of more than 16K will be
     omitted.  [Jeff Trawick]

  *) mod_proxy_fcgi: Handle reading protocol data that is split between
     packets.  [Jeff Trawick]

  *) mod_ssl: Improve handling of ephemeral DH and ECDH keys by
     allowing custom parameters to be configured via SSLCertificateFile,
     and by adding standardized DH parameters for 1024/2048/3072/4096 bits.
     Unless custom parameters are configured, the standardized parameters
     are applied based on the certificate's RSA/DSA key size. [Kaspar Brand]

  *) mod_ssl, configure: Require OpenSSL 0.9.8a or later. [Kaspar Brand]

  *) mod_ssl: drop support for export-grade ciphers with ephemeral RSA
     keys, and unconditionally disable aNULL, eNULL and EXP ciphers
     (not overridable via SSLCipherSuite). [Kaspar Brand]

  *) mod_proxy: Added support for unix domain sockets as the
     backend server endpoint. This also introduces an unintended
     incompatibility for third party modules using the mod_proxy
     proxy_worker_shared structure, especially for balancer lbmethod
     modules. [Jim Jagielski, Blaise Tarr <blaise tarr gmail com>]

  *) Add experimental cmake-based build system for Windows.  [Jeff Trawick,
     Tom Donovan]

  *) event MPM: Fix possible crashes (third party modules accessing c->sbh) 
     or occasional missed mod_status updates for some keepalive requests 
     under load. [Eric Covener]

  *) mod_authn_socache: Support optional initialization arguments for
     socache providers.  [Chris Darroch]

  *) mod_session: Reset the max-age on session save. PR 47476. [Alexey
     Varlamov <alexey.v.varlamov gmail com>]

  *) mod_session: After parsing the value of the header specified by the
     SessionHeader directive, remove the value from the response. PR 55279.
     [Graham Leggett]

  *) mod_headers: Allow for format specifiers in the substitution string
     when using Header edit. [Daniel Ruggeri]

  *) mod_dav: dav_resource->uri is treated as unencoded. This was an
     unnecessary ABI changed introduced in 2.4.6. PR 55397.

  *) mod_dav: Don't require lock tokens for COPY source. PR 55306.

  *) core: Don't truncate output when sending is interrupted by a signal,
     such as from an exiting CGI process. PR 55643. [Jeff Trawick]

  *) WinNT MPM: Exit the child if the parent process crashes or is terminated.
     [Oracle Corporation]

  *) Windows: Correct failure to discard stderr in some error log
     configurations.  (Error message AH00093)  [Jeff Trawick]

  *) mod_session_crypto: Allow using exec: calls to obtain session
     encryption key.  [Daniel Ruggeri]

  *) core: Add missing Reason-Phrase in HTTP response headers.
     PR 54946. [Rainer Jung]

  *) mod_rewrite: Make rewrite websocket-aware to allow proxying.
     PR 55598. [Chris Harris <chris.harris kitware com>]

  *) mod_ldap: When looking up sub-groups, use an implicit objectClass=*
     instead of an explicit cn=* filter. [David Hawes <dhawes vt.edu>]

  *) ab: Add wait time, fix processing time, and output write errors only if
     they occurred. [Christophe Jaillet]

  *) worker MPM: Don't forcibly kill worker threads if the child process is
     exiting gracefully.  [Oracle Corporation]

  *) core: apachectl -S prints wildcard name-based virtual hosts twice. 
     PR54948 [Eric Covener]

  *) mod_auth_basic: Add AuthBasicUseDigestAlgorithm directive to
     allow migration of passwords from digest to basic authentication.
     [Chris Darroch]

  *) ab: Add a new -l parameter in order not to check the length of the responses.
     This can be useful with dynamic pages.
     PR9945, PR27888, PR42040 [<ccikrs1 cranbrook edu>]

  *) Suppress formatting of startup messages written to the console when
     ErrorLogFormat is used.  [Jeff Trawick]

  *) mod_auth_digest: Be more specific when the realm mismatches because the
     realm has not been specified. [Graham Leggett]

  *) mod_proxy: Add a note in the balancer manager stating whether changes
     will or will not be persisted and whether settings are inherited.
     [Daniel Ruggeri, Jim Jagielski]

  *) core: Add util_fcgi.h and associated definitions and support
     routines for FastCGI, based largely on mod_proxy_fcgi.
     [Jeff Trawick]

  *) mod_headers: Add 'Header note header-name note-name' for copying a response
     headers value into a note. [Eric Covener]

  *) mod_headers: Add 'setifempty' command to Header and RequestHeader.
     [Eric Covener]

  *) mod_logio: new format-specifier %S (sum) which is the sum of received
     and sent byte counts.
     PR54015 [Christophe Jaillet]

  *) mod_deflate: Improve error detection when decompressing request bodies
     with trailing garbage: handle case where trailing bytes are in
     the same bucket. [Rainer Jung]

  *) mod_authz_groupfile, mod_authz_user: Reduce severity of AH01671 and AH01663
     from ERROR to DEBUG, since these modules do not know what mod_authz_core
     is doing with their AUTHZ_DENIED return value. [Eric Covener]

  *) mod_ldap: add TRACE5 for LDAP retries. [Eric Covener]

  *) mod_ldap: retry on an LDAP timeout during authn. [Eric Covener]

  *) mod_ldap: Change "LDAPReferrals off" to actually set the underlying LDAP 
     SDK option to OFF, and introduce "LDAPReferrals default" to take the SDK 
     default, sans rebind authentication callback.
     [Jan Kaluza <kaluze AT redhat.com>]

  *) core: Log a message at TRACE1 when the client aborts a connection.
     [Eric Covener]

  *) WinNT MPM: Don't crash during child process initialization if the
     Listen protocol is unrecognized.  [Jeff Trawick]

  *) modules: Fix some compiler warnings. [Guenter Knauf]

  *) Sync 2.4 and trunk
       - Avoid some memory allocation and work when TRACE1 is not activated
       - fix typo in include guard
       - indent
       - No need to lower the string before removing the path, it is just 
         a waste of time...
       - Save a few cycles
     [Christophe Jaillet <christophe.jaillet wanadoo.fr>]

  *) mod_filter: Add "change=no" as a proto-flag to FilterProtocol
     to remove a providers initial flags set at registration time.
     [Eric Covener]

  *) core, mod_ssl: Enable the ability for a module to reverse the sense of
     a poll event from a read to a write or vice versa. This is a step on
     the way to allow mod_ssl taking full advantage of the event MPM.
     [Graham Leggett]

  *) Makefile.win: Install proper pcre DLL file during debug build install.
     PR 55235.  [Ben Reser <ben reser org>]

  *) mod_ldap: Fix a potential memory leak or corruption.  PR 54936.
     [Zhenbo Xu <zhenbo1987 gmail com>]

  *) ab: Fix potential buffer overflows when processing the T and X
     command-line options.  PR 55360.
     [Mike Rumph <mike.rumph oracle.com>]

  *) fcgistarter: Specify SO_REUSEADDR to allow starting a server
     with old connections in TIME_WAIT.  [Jeff Trawick]

  *) core: Add open_htaccess hook which, in conjunction with dirwalk_stat
     and post_perdir_config (introduced in 2.4.5), allows mpm-itk to be 
     used without patches to httpd core. [Stefan Fritsch]

  *) support/htdbm: fix processing of -t command line switch. Regression
     introduced in 2.4.4
     PR 55264 [Jo Rhett <jrhett netconsonance com>]

  *) mod_lua: add websocket support via r:wsupgrade, r:wswrite, r:wsread 
     and r:wsping. [Daniel Gruno]

  *) mod_lua: add support for writing/reading cookies via r:getcookie and 
     r:setcookie. [Daniel Gruno]

  *) mod_lua: If the first yield() of a LuaOutputFilter returns a string, it should
     be prefixed to the response as documented. [Eric Covener] 
     Note: Not present in 2.4.7 CHANGES

  *) mod_lua: Remove ETAG, Content-Length, and Content-MD5 when a LuaOutputFilter
     is configured without mod_filter. [Eric Covener]
     Note: Not present in 2.4.7 CHANGES

  *) mod_lua: Register LuaOutputFilter scripts as changing the content and
     content-length by default, when run my mod_filter.  Previously,
     growing or shrinking a response that started with Content-Length set
     would require mod_filter and FilterProtocol change=yes. [Eric Covener]
     Note: Not present in 2.4.7 CHANGES

  *) mod_lua: Return a 500 error if a LuaHook* script doesn't return a
     numeric return code. [Eric Covener]
     Note: Not present in 2.4.7 CHANGES

Changes with Apache 2.4.6

  *) Revert a broken fix for PR54948 that was applied to 2.4.5 (which was
     not released) and found post-2.4.5 tagging.

Changes with Apache 2.4.5

  *) SECURITY: CVE-2013-1896 (cve.mitre.org)
     mod_dav: Sending a MERGE request against a URI handled by mod_dav_svn with
     the source href (sent as part of the request body as XML) pointing to a
     URI that is not configured for DAV will trigger a segfault. [Ben Reser
     <ben reser.org>]

  *) SECURITY: CVE-2013-2249 (cve.mitre.org)
     mod_session_dbd: Make sure that dirty flag is respected when saving
     sessions, and ensure the session ID is changed each time the session
     changes. This changes the format of the updatesession SQL statement.
     Existing configurations must be changed.
     [Takashi Sato, Graham Leggett]

  *) mod_auth_basic: Add a generic mechanism to fake basic authentication
     using the ap_expr parser. AuthBasicFake allows the administrator to 
     construct their own username and password for basic authentication based 
     on their needs. [Graham Leggett]

  *) mpm_event: Check that AsyncRequestWorkerFactor is not negative. PR 54254.
     [Jackie Zhang <jackie qq zhang gmail com>]

  *) mod_proxy: Ensure we don't attempt to amend a table we are iterating
     through, ensuring that all headers listed by Connection are removed.
     [Graham Leggett, Co-Advisor <coad measurement-factory.com>]

  *) mod_proxy_http: Make the proxy-interim-response environment variable
     effective by formally overriding origin server behaviour. [Graham
     Leggett, Co-Advisor <coad measurement-factory.com>]

  *) mod_proxy: Fix seg-faults when using the global pool on threaded
     MPMs [Thomas Eckert <thomas.r.w.eckert gmail.com>, Graham Leggett,
     Jim Jagielski]

  *) mod_deflate: Remove assumptions as to when an EOS bucket might arrive.
     Gracefully step aside if the body size is zero. [Graham Leggett]

  *) mod_ssl: Fix possible truncation of OCSP responses when reading from the
     server.  [Joe Orton]

  *) core: Support the SINGLE_LISTEN_UNSERIALIZED_ACCEPT optimization
     on Linux kernel versions 3.x and above.  PR 55121.  [Bradley Heilbrun
     <apache heilbrun.org>]

  *) mod_cache_socache: Make sure the CacheSocacheMaxSize directive is merged
     correctly. [Jens Låås <jelaas gmail.com>]

  *) rotatelogs: add -n number-of-files option to rotate through a number
     of fixed-name logfiles. [Eric Covener]

  *) mod_proxy: Support web-socket tunnels via mod_proxy_wstunnel.
     [Jim Jagielski]

  *) mod_cache_socache: Use the name of the socache implementation when performing
     a lookup rather than using the raw arguments. [Martin Ksellmann
     <martin@ksellmann.de>]

  *) core: Add dirwalk_stat hook.  [Jeff Trawick]

  *) core: Add post_perdir_config hook.
     [Steinar Gunderson <sgunderson bigfoot.com>]

  *) proxy_util: NULL terminate the right buffer in 'send_http_connect'.
     [Christophe Jaillet]

  *) mod_remoteip: close file in error path. [Christophe Jaillet]

  *) core: make the "default" parameter of the "ErrorDocument" option case
     insensitive. PR 54419 [Tianyin Xu <tixu cs ucsd edu>]

  *) mod_proxy_html: make the "ProxyHTMLFixups" options case insensitive.
     PR 54420 [Tianyin Xu <tixu cs ucsd edu>]

  *) mod_cache: Make option "CacheDisable" in mod_cache case insensitive.
     PR 54462 [Tianyin Xu <tixu cs ucsd edu>]

  *) mod_cache: If a 304 response indicates an entity not currently cached, then
     the cache MUST disregard the response and repeat the request without the
     conditional. [Graham Leggett, Co-Advisor <coad measurement-factory.com>]

  *) mod_cache: Ensure that we don't attempt to replace a cached response
     with an older response as per RFC2616 13.12. [Graham Leggett, Co-Advisor
     <coad measurement-factory.com>]

  *) core, mod_cache: Ensure RFC2616 compliance in ap_meets_conditions()
     with weak validation combined with If-Range and Range headers. Break
     out explicit conditional header checks to be useable elsewhere in the
     server. Ensure weak validation RFC compliance in the byteranges filter.
     Ensure RFC validation compliance when serving cached entities. PR 16142
     [Graham Leggett, Co-Advisor <coad measurement-factory.com>]

  *) core: Add the ability to do explicit matching on weak and strong ETags
     as per RFC2616 Section 13.3.3. [Graham Leggett, Co-Advisor
     <coad measurement-factory.com>]

  *) mod_cache: Ensure that updated responses to HEAD requests don't get
     mistakenly paired with a previously cached body. Ensure that any existing
     body is removed when a HEAD request is cached. [Graham Leggett,
     Co-Advisor <coad measurement-factory.com>]

  *) mod_cache: Honour Cache-Control: no-store in a request. [Graham Leggett]

  *) mod_cache: Make sure that contradictory entity headers present in a 304
     Not Modified response are caught and cause the entity to be removed.
     [Graham Leggett]

  *) mod_cache: Make sure Vary processing handles multivalued Vary headers and
     multivalued headers referred to via Vary. [Graham Leggett]

  *) mod_cache: When serving from cache, only the last header of a multivalued
     header was taken into account. Fixed. Ensure that Warning headers are
     correctly handled as per RFC2616. [Graham Leggett]

  *) mod_cache: Ignore response headers specified by no-cache=header and
     private=header as specified by RFC2616 14.9.1 What is Cacheable. Ensure
     that these headers are still processed when multiple Cache-Control
     headers are present in the response. PR 54706 [Graham Leggett,
     Yann Ylavic <ylavic.dev gmail.com>]

  *) mod_cache: Invalidate cached entities in response to RFC2616 Section
     13.10 Invalidation After Updates or Deletions. PR 15868 [Graham
     Leggett]

  *) mod_dav: Improve error handling in dav_method_put(), add new
     dav_join_error() function.  PR 54145.  [Ben Reser <ben reser.org>]

  *) mod_dav: Do not fail PROPPATCH when prop namespace is not known.
     PR 52559 [Diego Santa Cruz <diego.santaCruz spinetix.com>]

  *) mod_dav: When a PROPPATCH attempts to remove a non-existent dead
     property on a resource for which there is no dead property in the same
     namespace httpd segfaults. PR 52559 [Diego Santa Cruz
     <diego.santaCruz spinetix.com>]

  *) mod_dav: Sending an If or If-Match header with an invalid ETag doesn't
     result in a 412 Precondition Failed for a COPY operation. PR54610
     [Timothy Wood <tjw omnigroup.com>]

  *) mod_dav: Make sure that when we prepare an If URL for Etag comparison,
     we compare unencoded paths. PR 53910 [Timothy Wood <tjw omnigroup.com>]

  *) mod_deflate: Remove assumptions as to when an EOS bucket might arrive.
     Gracefully step aside if the body size is zero. [Graham Leggett]

  *) 'AuthGroupFile' and 'AuthUserFile' do not accept anymore the optional
     'standard' keyword . It was unused and not documented.
     PR54463 [Tianyin Xu <tixu cs.ucsd.edu> and Christophe Jaillet]

  *) core: Do not over allocate memory within 'ap_rgetline_core' for
     the common case. [Christophe Jaillet]

  *) core: speed up (for common cases) and reduce memory usage of
     ap_escape_logitem(). This should save 70-100 bytes in the request
     pool for a default config. [Christophe Jaillet]

  *) mod_dav: Ensure URI is correctly uriencoded on return. PR 54611
     [Timothy Wood <tjw omnigroup.com>]

  *) mod_proxy: Reject invalid values for Max-Forwards. [Graham Leggett,
     Co-Advisor <coad measurement-factory.com>]

  *) mod_cache: RFC2616 14.9.3 The s-maxage directive also implies the
     semantics of the proxy-revalidate directive. [Graham Leggett]

  *) mod_ssl: add support for subjectAltName-based host name checking
     in proxy mode (SSLProxyCheckPeerName). PR 54030. [Kaspar Brand]

  *) core: Use the proper macro for HTTP/1.1. [Graham Leggett]

  *) event MPM: Provide error handling for ThreadStackSize. PR 54311
     [Tianyin Xu <tixu cs.ucsd.edu>, Christophe Jaillet]

  *) mod_dav: Do not segfault on PROPFIND with a zero length DBM.
     PR 52559 [Diego Santa Cruz <diego.santaCruz spinetix.com>]

  *) core: Improve error message where client's request-line exceeds
     LimitRequestLine. PR 54384 [Christophe Jaillet]

  *) mod_macro: New module that provides macros within configuration files.
     [Fabien Coelho]

  *) mod_cache_socache: New cache implementation backed by mod_socache
     that replaces mod_mem_cache known from httpd 2.2. [Graham
     Leggett]

  *) htpasswd: Add -v option to verify a password. [Stefan Fritsch]

  *) mod_proxy: Add BalancerInherit and ProxyPassInherit to control
     whether Proxy Balancers and Workers are inherited by vhosts
     (default is On). [Jim Jagielski]

  *) mod_authnz_ldap: Allow using exec: calls to obtain LDAP bind
     password.  [Daniel Ruggeri]

  *) Added balancer parameter failontimeout to allow server admin
     to configure an IO timeout as an error in the balancer.
     [Daniel Ruggeri]

  *) mod_auth_digest: Fix crashes if shm initialization failed. [Stefan
     Fritsch]

  *) htpasswd, htdbm: Fix password generation. PR 54735. [Stefan Fritsch]

  *) core: Add workaround for gcc bug on sparc/64bit. PR 52900.
     [Stefan Fritsch]

  *) mod_setenvif: Fix crash in case SetEnvif and SetEnvIfExpr are used
     together. PR 54881. [Ruediger Pluem]

  *) htdigest: Fix buffer overflow when reading digest password file
     with very long lines. PR 54893. [Rainer Jung]

  *) ap_expr: Add the ability to base64 encode and base64 decode
     strings and to generate their SHA1 and MD5 hash.
     [Graham Leggett, Stefan Fritsch]

  *) mod_log_config: Fix crash when logging request end time for a failed
     request.  PR 54828 [Rainer Jung]

  *) mod_ssl: Catch missing, mismatched or encrypted client cert/key pairs
     with SSLProxyMachineCertificateFile/Path directives. PR 52212, PR 54698.
     [Keith Burdis <keith burdis.org>, Joe Orton, Kaspar Brand]

  *) mod_ssl: Quiet FIPS mode weak keys disabled and FIPS not selected emits
     in the error log to debug level.  [William Rowe]

  *) mod_cache_disk: CacheMinFileSize and CacheMaxFileSize were always
     using compiled in defaults of 1000000/1 respectively. [Eric Covener]

  *) mod_lbmethod_heartbeat, mod_heartmonitor: Respect DefaultRuntimeDir/
     DEFAULT_REL_RUNTIMEDIR for the heartbeat storage file.  [Jeff Trawick]

  *) mod_include: Use new ap_expr for 'elif', like 'if', 
     if legacy parser is not specified.  PR 54548 [Tom Donovan]

  *) mod_lua: Add some new functions: r:htpassword(), r:mkdir(), r:mkrdir(),
     r:rmdir(), r:touch(), r:get_direntries(), r.date_parse_rfc().
     [Guenter Knauf]

  *) mod_lua: Add multipart form data handling. [Daniel Gruno]

  *) mod_lua: If a LuaMapHandler doesn't return any value, log a warning
     and treat it as apache2.OK. [Eric Covener]

  *) mod_lua: Add bindings for apr_dbd/mod_dbd database access
     [Daniel Gruno]

  *) mod_lua: Add LuaInputFilter/LuaOutputFilter for creating content
     filters in Lua [Daniel Gruno]

  *) mod_lua: Allow scripts handled by the lua-script handler to return
     a status code to the client (such as a 302 or a 500) [Daniel Gruno]

  *) mod_lua: Decline handling 'lua-script' if the file doesn't exist,
     rather than throwing an internal server error. [Daniel Gruno]

  *) mod_lua: Add functions r:flush and r:sendfile as well as additional
     request information to the request_rec structure. [Daniel Gruno]

  *) mod_lua: Add a server scope for Lua states, which creates a pool of
     states with manageable minimum and maximum size. [Daniel Gruno]

  *) mod_lua: Add new directive, LuaMapHandler, for dynamically mapping
     URIs to Lua scripts and functions using regular expressions.
     [Daniel Gruno]

  *) mod_lua: Add new directive LuaCodeCache for controlling in-memory
     caching of lua scripts. [Daniel Gruno]

Changes with Apache 2.4.4

  *) SECURITY: CVE-2012-3499 (cve.mitre.org)
     Various XSS flaws due to unescaped hostnames and URIs HTML output in
     mod_info, mod_status, mod_imagemap, mod_ldap, and mod_proxy_ftp.
     [Jim Jagielski, Stefan Fritsch, Niels Heinen <heinenn google com>]

  *) SECURITY: CVE-2012-4558 (cve.mitre.org)
     XSS in mod_proxy_balancer manager interface. [Jim Jagielski,
     Niels Heinen <heinenn google com>]

  *) mod_dir: Add support for the value 'disabled' in FallbackResource.
     [Vincent Deffontaines]

  *) mod_proxy_connect: Don't keepalive the connection to the client if the
     backend closes the connection. PR 54474. [Pavel Mateja <pavel netsafe cz>]

  *) mod_lua: Add bindings for mod_dbd/apr_dbd database access.
     [Daniel Gruno]

  *) mod_proxy: Allow for persistence of local changes made via the
     balancer-manager between graceful/normal restarts and power
     cycles. [Jim Jagielski]

  *) mod_proxy: Fix startup crash with mis-defined balancers.
     PR 52402. [Jim Jagielski]

  *) --with-module: Fix failure to integrate them into some existing
     module directories.  PR 40097.  [Jeff Trawick]

  *) htcacheclean: Fix potential segfault if "-p" is omitted.  [Joe Orton]

  *) mod_proxy_http: Honour special value 0 (unlimited) of LimitRequestBody
     PR 54435.  [Pavel Mateja <pavel netsafe.cz>]

  *) mod_proxy_ajp: Support unknown HTTP methods. PR 54416.
     [Rainer Jung]

  *) htcacheclean: Fix list options "-a" and "-A".
     [Rainer Jung]

  *) mod_slotmem_shm: Fix mistaken reset of num_free for restored shm.
     [Jim Jagielski]

  *) mod_proxy: non-existence of byrequests is not an immediate error.
     [Jim Jagielski]

  *) mod_proxy_balancer: Improve output of balancer-manager (re: Drn,
     Dis, Ign, Stby). PR 52478 [Danijel <dt-ng rbfh de>]

  *) configure: Fix processing of --disable-FEATURE for various features.
     [Jeff Trawick]

  *) mod_dialup/mod_http: Prevent a crash in mod_dialup in case of internal
     redirect. PR 52230.

  *) various modules, rotatelogs: Replace use of apr_file_write() with
     apr_file_write_full() to prevent incomplete writes. PR 53131.
     [Nicolas Viennot <apache viennot biz>, Stefan Fritsch]

  *) ab: Support socket timeout (-s timeout).
     [Guido Serra <zeph fsfe org>]

  *) httxt2dbm: Correct length computation for the 'value' stored in the
     DBM file. PR 47650 [jon buckybox com]

  *) core: Be more correct about rejecting directives that cannot work in <If>
     sections. [Stefan Fritsch]

  *) core: Fix directives like LogLevel that need to know if they are invoked
     at virtual host context or in Directory/Files/Location/If sections to
     work properly in If sections that are not in a Directory/Files/Location.
     [Stefan Fritsch]

  *) mod_xml2enc: Fix problems with charset conversion altering the
     Content-Length. [Micha Lenk <micha lenk info>]

  *) ap_expr: Add req_novary function that allows HTTP header lookups
     without adding the name to the Vary header. [Stefan Fritsch]

  *) mod_slotmem_*: Add in new fgrab() function which forces a grab and
     slot allocation on a specified slot. Allow for clearing of inuse
     array. [Jim Jagielski]

  *) mod_proxy_ftp: Fix segfaults on IPv4 requests to hosts with DNS
     AAAA records. PR  40841. [Andrew Rucker Jones <arjones simultan
     dyndns org>, <ast domdv de>, Jim Jagielski]

  *) mod_auth_form: Make sure that get_notes_auth() sets the user as does
     get_form_auth() and get_session_auth(). Makes sure that REMOTE_USER
     does not vanish during mod_include driven subrequests. [Graham
     Leggett]

  *) mod_cache_disk: Resolve errors while revalidating disk-cached files on
     Windows ("...rename tempfile to datafile failed..."). PR 38827
     [Eric Covener]

  *) mod_proxy_balancer: Bring XML output up to date. [Jim Jagielski]

  *) htpasswd, htdbm: Optionally read passwords from stdin, as more
     secure alternative to -b.  PR 40243. [Adomas Paltanavicius <adomas
     paltanavicius gmail com>, Stefan Fritsch]

  *) htpasswd, htdbm: Add support for bcrypt algorithm (requires
     apr-util 1.5 or higher). PR 49288. [Stefan Fritsch]

  *) htpasswd, htdbm: Put full 48bit of entropy into salt, improve
     error handling. Add some of htpasswd's improvements to htdbm,
     e.g. warn if password is truncated by crypt(). [Stefan Fritsch]

  *) mod_auth_form: Support the expr parser in the
     AuthFormLoginRequiredLocation, AuthFormLoginSuccessLocation and
     AuthFormLogoutLocation directives. [Graham Leggett]

  *) mod_ssl: Add support for TLS-SRP (Secure Remote Password key exchange
     for TLS, RFC 5054). PR 51075. [Quinn Slack <sqs cs stanford edu>,
     Christophe Renou, Peter Sylvester]

  *) mod_rewrite: Stop mergeing RewriteBase down to subdirectories
     unless new option 'RewriteOptions MergeBase' is configured.
     PR 53963. [Eric Covener]

  *) mod_header: Allow for exposure of loadavg and server load using new 
     format specifiers %l, %i, %b [Jim Jagielski]

  *) core: Make ap_regcomp() return AP_REG_ESPACE if out of memory.  Make
     ap_pregcomp() abort if out of memory. This raises the minimum PCRE
     requirement to version 6.0. [Stefan Fritsch]

  *) mod_proxy: Add ability to configure the sticky session separator.
     PR 53893. [<inu inusasha de>, Jim Jagielski]

  *) mod_dumpio: Correctly log large messages
     PR 54179 [Marek Wianecki <mieszek2 interia pl>]

  *) core: Don't fail at startup with AH00554 when Include points to 
     a directory without any wildcard character. [Eric Covener]

  *) core: Fail startup if the argument to ServerTokens is unrecognized.
     [Jackie Zhang  <jackie.qq.zhang gmail.com>]

  *) mod_log_forensic: Don't log a spurious "-" if a request has been rejected
     before mod_log_forensic could attach its id to it. [Stefan Fritsch]

  *) rotatelogs: Omit the second argument for the first invocation of
     a post-rotate program when -p is used, per the documentation.
     [Joe Orton]

  *) mod_session_dbd: fix a segmentation fault in the function dbd_remove.
     PR 53452. [<rebanerebane gmail com>, Reimo Rebane]

  *) core: Functions to provide server load values: ap_get_sload() and
     ap_get_loadavg(). [Jim Jagielski, Jan Kaluza <jkaluza redhat.com>,
     Jeff Trawick]

  *) mod_ldap: Fix regression in handling "server unavailable" errors on 
     Windows.  PR 54140.  [Eric Covener]

  *) syslog logging: Remove stray ", referer" at the end of some messages.
     [Jeff Trawick]

  *) "Iterate" directives: Report an error if no arguments are provided.
     [Jeff Trawick]

  *) mod_ssl: Change default for SSLCompression to off, as compression
     causes security issues in most setups. (The so called "CRIME" attack).
     [Stefan Fritsch]

  *) ab: add TLS1.1/TLS1.2 options to -f switch, and adapt output
     to more accurately report the negotiated protocol. PR 53916.
     [Nicolás Pernas Maradei <nico emutex com>, Kaspar Brand]

  *) core: ErrorDocument now works for requests without a Host header.
     PR 48357.  [Jeff Trawick]

  *) prefork: Avoid logging harmless errors during graceful stop.
     [Joe Orton, Jeff Trawick]

  *) mod_proxy: When concatting for PPR, avoid cases where we
     concat ".../" and "/..." to create "...//..." [Jim Jagielski]

  *) mod_cache: Wrong content type and character set when
     mod_cache serves stale content because of a proxy error. 
     PR 53539.  [Rainer Jung, Ruediger Pluem]

  *) mod_proxy_ajp: Fix crash in packet dump code when logging
     with LogLevel trace7 or trace8.  PR 53730.  [Rainer Jung]

  *) httpd.conf: Removed the configuration directives setting a bad_DNT
     environment introduced in 2.4.3. The actual directives are commented
     out in the default conf file.

  *) core: Apply length limit when logging Status header values.
     [Jeff Trawick, Chris Darroch]

  *) mod_proxy_balancer: The nonce is only derived from the UUID iff
     not set via the 'nonce' balancer param. [Jim Jagielski]

  *) mod_ssl: Match wildcard SSL certificate names in proxy mode.  
     PR 53006.  [Joe Orton]

  *) Windows: Fix output of -M, -L, and similar command-line options
     which display information about the server configuration.
     [Jeff Trawick]

Changes with Apache 2.4.3

  *) SECURITY: CVE-2012-3502  (cve.mitre.org)
     mod_proxy_ajp, mod_proxy_http: Fix an issue in back end
     connection closing which could lead to privacy issues due
     to a response mixup. PR 53727. [Rainer Jung]

  *) SECURITY: CVE-2012-2687 (cve.mitre.org)
     mod_negotiation: Escape filenames in variant list to prevent a
     possible XSS for a site where untrusted users can upload files to
     a location with MultiViews enabled. [Niels Heinen <heinenn google.com>]

  *) mod_authnz_ldap: Don't try a potentially expensive nested groups
     search before exhausting all AuthLDAPGroupAttribute checks on the
     current group. PR 52464 [Eric Covener]

  *) mod_lua: Add new directive LuaAuthzProvider to allow implementing an
     authorization provider in lua. [Stefan Fritsch]

  *) core: Be less strict when checking whether Content-Type is set to 
     "application/x-www-form-urlencoded" when parsing POST data, 
     or we risk losing data with an appended charset. PR 53698
     [Petter Berntsen <petterb gmail.com>]

  *) httpd.conf: Added configuration directives to set a bad_DNT environment
     variable based on User-Agent and to remove the DNT header field from
     incoming requests when a match occurs. This currently has the effect of
     removing DNT from requests by MSIE 10.0 because it deliberately violates
     the current specification of DNT semantics for HTTP. [Roy T. Fielding]

  *) mod_socache_shmcb: Fix bus error due to a misalignment
     in some 32 bit builds, especially on Solaris Sparc.
     PR 53040.  [Rainer Jung]

  *) mod_cache: Set content type in case we return stale content.
     [Ruediger Pluem]

  *) Windows: Fix SSL failures on windows with AcceptFilter https none.
     PR 52476.  [Jeff Trawick]

  *) ab: Fix read failure when targeting SSL server.  [Jeff Trawick]

  *) The following now respect DefaultRuntimeDir/DEFAULT_REL_RUNTIMEDIR:
     - mod_auth_digest: shared memory file
     [Jeff Trawick]

  *) htpasswd: Use correct file mode for checking if file is writable.
     PR 45923. [Stefan Fritsch]

  *) mod_rewrite: Fix crash with dbd RewriteMaps. PR 53663. [Mikhail T.
     <mi apache aldan algebra com>]

  *) mod_ssl: Add new directive SSLCompression to disable TLS-level
     compression. PR 53219. [Björn Jacke <bjoern j3e de>, Stefan Fritsch]

  *) mod_lua: Add a few missing request_rec fields. Rename remote_ip to
     client_ip to match conn_rec. [Stefan Fritsch]

  *) mod_lua: Change prototype of vm_construct, to work around gcc bug which
     causes a segfault. PR 52779. [Dick Snippe <Dick Snippe tech omroep nl>]

  *) mpm_event: Don't count connections in lingering close state when
     calculating how many additional connections may be accepted.
     [Stefan Fritsch]

  *) mod_ssl: If exiting during initialization because of a fatal error,
     log a message to the main error log pointing to the appropriate
     virtual host error log. [Stefan Fritsch]

  *) mod_proxy_ajp: Reduce memory usage in case of many keep-alive requests on
     one connection. PR 52275. [Naohiro Ooiwa <naohiro ooiwa miraclelinux com>]

  *) mod_proxy_balancer: Restore balancing after a failed worker has
     recovered when using lbmethod_bybusyness.  PR 48735.  [Jeff Trawick]

  *) mod_setenvif: Compile some global regex only once during startup.
     This should save some memory, especially with .htaccess.
     [Stefan Fritsch]

  *) core: Add the port number to the vhost's name in the scoreboard.
     [Stefan Fritsch]

  *) mod_proxy: Fix ProxyPassReverse for balancer configurations.
     PR 45434.  [Joe Orton]

  *) mod_lua: Add the parsebody function for parsing POST data. PR 53064.
     [Daniel Gruno]

  *) apxs: Use LDFLAGS from config_vars.mk in addition to CFLAGS and CPPFLAGS.
     [Stefan Fritsch]

  *) mod_proxy: Fix memory leak or possible corruption in ProxyBlock
     implementation.  [Ruediger Pluem, Joe Orton]

  *) mod_proxy: Check hostname from request URI against ProxyBlock list,
     not forward proxy, if ProxyRemote* is configured.  [Joe Orton]

  *) mod_proxy_connect: Avoid DNS lookup on hostname from request URI 
     if ProxyRemote* is configured.  PR 43697.  [Joe Orton]

  *) mpm_event, mpm_worker: Remain active amidst prevalent child process
     resource shortages.  [Jeff Trawick]

  *) Add "strict" and "warnings" pragmas to Perl scripts.  [Rich Bowen]

  *) The following now respect DefaultRuntimeDir/DEFAULT_REL_RUNTIMEDIR:
     - core: the scoreboard (ScoreBoardFile), pid file (PidFile), and
       mutexes (Mutex)
     [Jim Jagielski]

  *) ab: Fix bind() errors.  [Joe Orton]

  *) mpm_event: Don't do a blocking write when starting a lingering close
     from the listener thread. PR 52229. [Stefan Fritsch]

  *) mod_so: If a filename without slashes is specified for LoadFile or
     LoadModule and the file cannot be found in the server root directory,
     try to use the standard dlopen() search path. [Stefan Fritsch]

  *) mpm_event, mpm_worker: Fix cases where the spawn rate wasn't reduced
     after child process resource shortages.  [Jeff Trawick]

  *) mpm_prefork: Reduce spawn rate after a child process exits due to
     unexpected poll or accept failure.  [Jeff Trawick]

  *) core: Log value of Status header line in script responses rather
     than the fixed header name.  [Chris Darroch]

  *) mod_ssl: Fix handling of empty response from OCSP server.
     [Jim Meyering <meyering redhat.com>, Joe Orton]

  *) mpm_event: Fix handling of MaxConnectionsPerChild. [Stefan Fritsch]

  *) mod_authz_core: If an expression in "Require expr" returns denied and
     references %{REMOTE_USER}, trigger authentication and retry. PR 52892.
     [Stefan Fritsch]

  *) core: Always log if LimitRequestFieldSize triggers.  [Stefan Fritsch]

  *) mod_deflate: Skip compression if compression is enabled at SSL level.
     [Stefan Fritsch]

  *) core: Add missing HTTP status codes registered with IANA.
     [Julian Reschke <julian.reschke gmx.de>, Rainer Jung]

  *) mod_ldap: Treat the "server unavailable" condition as a transient
     error with all LDAP SDKs.  [Filip Valder <filip.valder vsb.cz>]

  *) core: Fix spurious "not allowed here" error returned when the Options 
     directive is used in .htaccess and "AllowOverride Options" (with no 
     specific options restricted) is configured.  PR 53444. [Eric Covener]

  *) mod_authz_core: Fix parsing of Require arguments in <AuthzProviderAlias>.
     PR 53048. [Stefan Fritsch]

  *) mod_log_config: Fix %{abc}C truncating cookie values at first "=".
     PR 53104. [Greg Ames]

  *) mod_ext_filter: Fix error_log spam when input filters are configured.  
     [Joe Orton]

  *) mod_rewrite: Add "AllowAnyURI" option. PR 52774. [Joe Orton]

  *) htdbm, htpasswd: Don't crash if crypt() fails (e.g. with FIPS enabled). 
     [Paul Wouters <pwouters redhat.com>, Joe Orton]

  *) core: Use a TLS 1.0 close_notify alert for internal dummy connection if
     the chosen listener is configured for https. [Joe Orton]

  *) mod_proxy: Use the the same hostname for SNI as for the HTTP request when
     forwarding to SSL backends. PR 53134.
     [Michael Weiser <michael weiser.dinsnail.net>, Ruediger Pluem]

  *) mod_info: Display all registered providers. [Stefan Fritsch]

  *) mod_ssl: Send the error message for speaking http to an https port using
     HTTP/1.0 instead of HTTP/0.9, and omit the link that may be wrong when
     using SNI. PR 50823. [Stefan Fritsch]

  *) core: Fix segfault in logging if r->useragent_addr or c->client_addr is
     unset. PR 53265. [Stefan Fritsch]

  *) log_server_status: Bring Perl style forward to the present, use
     standard modules, update for new format of server-status output.
     PR 45424. [Richard Bowen, Dave Brondsema, and others]

  *) mod_sed, mod_log_debug, mod_rewrite: Symbol namespace cleanups. 
     [Joe Orton, André Malo]

  *) core: Prevent "httpd -k restart" from killing server in presence of
     config error. [Joe Orton]

  *) mod_proxy_fcgi: If there is an error reading the headers from the
     backend, send an error to the client. PR 52879. [Stefan Fritsch]

Changes with Apache 2.4.2

  *) SECURITY: CVE-2012-0883 (cve.mitre.org)
     envvars: Fix insecure handling of LD_LIBRARY_PATH that could lead to the
     current working directory to be searched for DSOs. [Stefan Fritsch]

  *) mod_slotmem_shm: Honor DefaultRuntimeDir [Jim Jagielski]

  *) mod_ssl: Fix crash with threaded MPMs due to race condition when
     initializing EC temporary keys. [Stefan Fritsch]

  *) mod_rewrite: Fix RewriteCond integer checks to be parsed correctly.
     PR 53023. [Axel Reinhold <apache freakout.de>, André Malo]