CHANGES

     processing is completed, avoiding orphaned callback pointers.
     [Brett Gervasoni <brettg senseofsecurity.com>, Jeff Trawick]

  *) core: Filter init functions are now run strictly once per request
     before handler invocation.  The init functions are no longer run
     for connection filters.  PR 49328.  [Joe Orton]

  *) core: Adjust the output filter chain correctly in an internal
     redirect from a subrequest, preserving filters from the main
     request as necessary.  PR 17629.  [Joe Orton]

  *) mod_cache: Explicitly allow cache implementations to cache a 206 Partial
     Response if they so choose to do so. Previously an attempt to cache a 206
     was arbitrarily allowed if the response contained an Expires or
     Cache-Control header, and arbitrarily denied if both headers were missing.
     [Graham Leggett]

  *) core: Add microsecond timestamp fractions, process id and thread id
     to the error log. [Rainer Jung]

  *) configure: The "most" module set gets build by default.  [Rainer Jung]

  *) configure: Building dynamic modules (DSO) by default.  [Rainer Jung]

  *) configure: Fix broken VPATH build when using included APR.
     [Rainer Jung]

  *) mod_session_crypto: Fix configure problem when building
     with APR 2 and for VPATH builds with included APR.
     [Rainer Jung]

  *) mod_session_crypto: API compatibility with APR 2 crypto and
     APR Util 1.x crypto. [Rainer Jung]

  *) ab: Fix memory leak with -v2 and SSL. PR 49383.
     [Pavel Kankovsky <peak argo troja mff cuni cz>]

  *) core: Add per-module and per-directory loglevel configuration.
           Add some more trace logging.
     mod_rewrite: Replace RewriteLog/RewriteLogLevel with trace log levels.
     mod_ssl: Replace LogLevelDebugDump with trace log levels.
     mod_ssl/mod_proxy*: Adjust loglevels to be less verbose at levels info
           and debug.
     mod_dumpio:  Replace DumpIOLogLevel with trace log levels.
     [Stefan Fritsch]

  *) mod_ldap: LDAP caching was suppressed (and ldap-status handler returns
     title page only) when any mod_ldap directives were used in VirtualHost
     context.  [Eric Covener]

  *) mod_disk_cache: Decline the opportunity to cache if the response is
     a 206 Partial Content. This stops a reverse proxied partial response
     from becoming cached, and then being served in subsequent responses.
     [Graham Leggett]

  *) mod_deflate: avoid the risk of forwarding data before headers are set.
     PR 49369 [Matthew Steele <mdsteele google.com>]

  *) mod_authnz_ldap: Ensure nested groups are checked when the
     top-level group doesn't have any direct non-group members
     of attributes in AuthLDAPGroupAttribute. [Eric Covener]

  *) mod_authnz_ldap: Search or Comparison during authorization phase
     can use the credentials from the authentication phase
     (AuthLDAPSearchAsUSer,AuthLDAPCompareAsUser).
     PR 48340 [Domenico Rotiroti, Eric Covener]

  *) mod_authnz_ldap: Allow the initial DN search during authentication
     to use the HTTP username/pass instead of an anonymous or hard-coded
     LDAP id (AuthLDAPInitialBindAsUser, AuthLDAPInitialBindPattern).
     [Eric Covener]

  *) mod_authnz_ldap: Publish requested LDAP data with an AUTHORIZE_ prefix
     when this module is used for authorization. See AuthLDAPAuthorizePrefix.
     PR 45584 [Eric Covener]

  *) apxs -q: Stop filtering out ':' characters from the reported values.
     PR 45343.  [Bill Cole]

  *) prefork MPM: Work around possible crashes on child exit in APR reslist
     cleanup code.  PR 43857.  [Tom Donovan]

  *) ab: fix number of requests sent by ab when keepalive is enabled.  PR 48497.
     [Bryn Dole <dole blekko.com>]

  *) Log an error for failures to read a chunk-size, and return 408 instead of
     413 when this is due to a read timeout.  This change also fixes some cases
     of two error documents being sent in the response for the same scenario.
     [Eric Covener] PR49167

  *) mod_proxy_balancer: Add new directive BalancerNonce to allow admin
     to control/set the nonce used in the balancer-manager application.
     [Jim Jagielski]

  *) mod_proxy_connect: Support port ranges in AllowConnect. PR 23673.
     [Stefan Fritsch]

  *) Proxy balancer: support setting error status according to HTTP response
     code from a backend.  PR 48939.  [Daniel Ruggeri <DRuggeri primary.net>]

  *) htcacheclean: Introduce the ability to clean specific URLs from the
     cache, if provided as an optional parameter on the command line.
     [Graham Leggett]

  *) core: Introduce the IncludeStrict directive, which explicitly fails
     server startup if no files or directories match a wildcard path.
     [Graham Leggett]

  *) htcacheclean: Report additional statistics about entries deleted.
     PR 48944. [Mark Drayton mark markdrayton.info]

  *) Introduce SSLFIPS directive to support OpenSSL FIPS_mode; permits all
     builds of mod_ssl to use 'SSLFIPS off' for portability, but the proper
     build of openssl is required for 'SSLFIPS on'.  PR 46270.
     [Dr Stephen Henson <steve openssl.org>, William Rowe]

  *) mod_proxy_http: Log the port of the remote server in various messages.
     PR 48812. [Igor Galić <i galic brainsware org>]

  *) mod_reqtimeout: Do not wrongly enforce timeouts for mod_proxy's backend
     connections and other protocol handlers (like mod_ftp). [Stefan Fritsch]

  *) mod_proxy_ajp: Really regard the operation a success, when the client
     aborted the connection. In addition adjust the log message if the client
     aborted the connection. [Ruediger Pluem]

  *) mod_ssl: Add the 'SSLInsecureRenegotiation' directive, which
     allows insecure renegotiation with clients which do not yet
     support the secure renegotiation protocol.  [Joe Orton]

  *) mod_ssl: Fix a potential I/O hang if a long list of trusted CAs
     is configured for client cert auth. PR 46952.  [Joe Orton]

  *) core: Only log a 408 if it is no keepalive timeout. PR 39785
     [Ruediger Pluem,  Mark Montague <markmont umich.edu>]

  *) support/rotatelogs: Add -L option to create a link to the current
     log file.  PR 48761 [<lyndon orthanc.ca>, Dan Poirier]

  *) mod_ldap: Update LDAPTrustedClientCert to consistently be a per-directory
     setting only, matching most of the documentation and examples.
     PR 46541 [Paul Reder, Eric Covener]

  *) mod_ldap: LDAPTrustedClientCert now accepts CA_DER/CA_BASE64 argument
     types previously allowed only in LDAPTrustedGlobalCert. [Eric Covener]

  *) mod_negotiation: Preserve query string over multiviews negotiation.
     This buglet was fixed for type maps in 2.2.6, but the same issue
     affected multiviews and was overlooked.
     PR 33112 [Joergen Thomsen <apache jth.net>]

  *) mod_ldap: Eliminate a potential crash with multiple LDAPTrustedClientCert
     when some are not password-protected. [Eric Covener]

  *) Fix startup segfault when the Mutex directive is used but no loaded
     modules use httpd mutexes.  PR 48787.  [Jeff Trawick]

  *) Proxy: get the headers right in a HEAD request with
     ProxyErrorOverride, by checking for an overridden error
     before not after going into a catch-all code path.
     PR 41646.  [Nick Kew, Stuart Children]

  *) support/rotatelogs: Support the simplest log rotation case, log
     truncation. Useful when the log is being processed in real time
     using a command like tail. [Graham Leggett]

  *) support/htcacheclean: Teach it how to write a pid file (modelled on
     httpd's writing of a pid file) so that it becomes possible to run
     more than one instance of htcacheclean on the same machine.
     [Graham Leggett]

  *) Log command line on startup, so there's a record of command line
     arguments like -f.  PR 48752.  [Dan Poirier]

  *) Introduce mod_reflector, a handler capable of reflecting POSTed
     request bodies back within the response through the output filter
     stack. Can be used to turn an output filter into a web service.
     [Graham Leggett]

  *) mod_proxy_http: Make sure that when an ErrorDocument is served
     from a reverse proxied URL, that the subrequest respects the status
     of the original request. This brings the behaviour of proxy_handler
     in line with default_handler. PR 47106. [Graham Leggett]

  *) Support wildcards in both the directory and file components of
     the path specified by the Include directive. [Graham Leggett]

  *) mod_proxy, mod_proxy_http: Support remote https proxies
     by using HTTP CONNECT.  PR 19188.
     [Philippe Dutrueux <lilas evidian.com>, Rainer Jung]

  *) apxs: Fix -A and -a options to ignore whitespace in httpd.conf
     [Philip M. Gollucci]

  *) worker: Don't report server has reached MaxClients until it has.
     Add message when server gets within MinSpareThreads of MaxClients.
     PR 46996.  [Dan Poirier]

  *) mod_session: Session expiry was being initialised, but not updated
     on each session save, resulting in timed out sessions when there
     should not have been. Fixed. [Graham Leggett]

  *) mod_log_config: Add the R option to log the handler used within the
     request. [Christian Folini <christian.folini netnea com>]

  *) mod_include: Allow fine control over the removal of Last-Modified and
     ETag headers within the INCLUDES filter, making it possible to cache
     responses if desired. Fix the default value of the SSIAccessEnable
     directive.  [Graham Leggett]

  *) Add new UnDefine directive to undefine a variable. PR 35350.
     [Stefan Fritsch]

  *) Make ap_pregsub(), used by AliasMatch and friends, use the same syntax
     for regex backreferences as mod_rewrite and mod_include: Remove the use
     of '&' as an alias for '$0' and allow to escape any character with a
     backslash. PR 48351. [Stefan Fritsch]

  *) mod_authnz_ldap: If AuthLDAPCharsetConfig is set, also convert the
     password to UTF-8. PR 45318.
     [Johannes Müller <joh_m gmx.de>, Stefan Fritsch]

  *) ab: Fix calculation of requests per second in HTML output. PR 48594.
     [Stefan Fritsch]

  *) mod_authnz_ldap: Failures to map a username to a DN, or to check a user
     password now result in an informational level log entry instead of
     warning level.  [Eric Covener]

Changes with Apache 2.3.5

  *) SECURITY: CVE-2010-0434 (cve.mitre.org)
     Ensure each subrequest has a shallow copy of headers_in so that the
     parent request headers are not corrupted.  Eliminates a problematic
     optimization in the case of no request body.  PR 48359
     [Jake Scott, William Rowe, Ruediger Pluem]

  *) Turn static function get_server_name_for_url() into public
     ap_get_server_name_for_url() and use it where appropriate. This
     fixes mod_rewrite generating invalid URLs for redirects to IPv6
     literal addresses. [Stefan Fritsch]

  *) mod_ldap: Introduce new config option LDAPTimeout to set the timeout
     for LDAP operations like bind and search. [Stefan Fritsch]

  *) mod_proxy, mod_proxy_ftp: Move ProxyFtpDirCharset from mod_proxy to
     mod_proxy_ftp. [Takashi Sato]

  *) mod_proxy, mod_proxy_connect: Move AllowCONNECT from mod_proxy to
     mod_proxy_connect. [Takashi Sato]

  *) mod_cache: Do an exact match of the keys defined by
     CacheIgnoreURLSessionIdentifiers against the querystring instead of
     a partial match.  PR 48401.
     [Dodou Wang <wangdong.08 gmail.com>, Ruediger Pluem]

  *) mod_proxy_balancer: Fix crash in balancer-manager. [Rainer Jung]

  *) Core HTTP: disable keepalive when the Client has sent
     Expect: 100-continue
     but we respond directly with a non-100 response.
     Keepalive here led to data from clients continuing being treated as
     a new request.
     PR 47087 [Nick Kew]

  *) Core: reject NULLs in request line or request headers.
     PR 43039 [Nick Kew]

  *) Core: (re)-introduce -T commandline option to suppress documentroot
     check at startup.
     PR 41887 [Jan van den Berg <janvdberg gmail.com>]

  *) mod_autoindex: support XHTML as equivalent to HTML in IndexOptions,
                    ScanHTMLTitles, ReadmeName, HeaderName
     PR 48416 [Dmitry Bakshaev <dab18 izhnet.ru>, Nick Kew]

  *) Proxy: Fix ProxyPassReverse with relative URL
     Derived (slightly erroneously) from PR 38864 [Nick Kew]

  *) mod_headers: align Header Edit with Header Set when used on Content-Type
     PR 48422 [Cyril Bonté <cyril.bonte free.fr>, Nick Kew>]

  *) mod_headers: Enable multi-match-and-replace edit option
     PR 46594 [Nick Kew]

  *) mod_filter: enable it to act on non-200 responses.
     PR 48377 [Nick Kew]

Changes with Apache 2.3.4

  *) Replace AcceptMutex, LockFile, RewriteLock, SSLMutex, SSLStaplingMutex,
     and WatchdogMutexPath with a single Mutex directive.  Add APIs to
     simplify setup and user customization of APR proc and global mutexes.
     (See util_mutex.h.)  Build-time setting DEFAULT_LOCKFILE is no longer
     respected; set DEFAULT_REL_RUNTIMEDIR instead.  [Jeff Trawick]

  *) http_core: KeepAlive no longer accepts other than On|Off.
     [Takashi Sato]

  *) mod_dav: Remove errno from dav_error interface.  Calls to dav_new_error()
     and dav_new_error_tag() must be adjusted to add an apr_status_t parameter.
     [Jeff Trawick]

  *) mod_authnz_ldap: Add AuthLDAPBindAuthoritative to allow Authentication to
     try other providers in the case of an LDAP bind failure.
     PR 46608 [Justin Erenkrantz, Joe Schaefer, Tony Stevenson]

  *) Build: fix --with-module to work as documented
     PR 43881 [Gez Saunders <gez.saunders virgin.net>]

Changes with Apache 2.3.3

  *) SECURITY: CVE-2009-3095 (cve.mitre.org)
     mod_proxy_ftp: sanity check authn credentials.
     [Stefan Fritsch <sf fritsch.de>, Joe Orton]

  *) SECURITY: CVE-2009-3094 (cve.mitre.org)
     mod_proxy_ftp: NULL pointer dereference on error paths.
     [Stefan Fritsch <sf fritsch.de>, Joe Orton]

  *) mod_ssl: enable support for ECC keys and ECDH ciphers.  Tested against
     OpenSSL 1.0.0b3.  [Vipul Gupta <vipul.gupta sun.com>, Sander Temme]

  *) mod_dav: Include uri when logging a PUT error due to connection abort.
     PR 38149. [Stefan Fritsch]

  *) mod_dav: Return 409 instead of 500 for a LOCK request if the parent
     resource does not exist or is not a collection. PR 43465. [Stefan Fritsch]

  *) mod_dav_fs: Return 409 instead of 500 for Litmus test case copy_nodestcoll
     (a COPY request where the parent of the destination resource does not
     exist). PR 39299. [Stefan Fritsch]

  *) mod_dav_fs: Don't delete the whole file if a PUT with content-range failed.
     PR 42896. [Stefan Fritsch]

  *) mod_dav_fs: Make PUT create files atomically and no longer destroy the
     old file if the transfer aborted. PR 39815. [Paul Querna, Stefan Fritsch]

  *) mod_dav_fs: Remove inode keyed locking as this conflicts with atomically
     creating files. On systems with inode numbers, this is a format change of
     the DavLockDB. The old DavLockDB must be deleted on upgrade.
     [Stefan Fritsch]

  *) mod_log_config: Make ${cookie}C correctly match whole cookie names
     instead of substrings. PR 28037. [Dan Franklin <dan dan-franklin.com>,
     Stefan Fritsch]

  *) vhost: A purely-numeric Host: header should not be treated as a port.
     PR 44979 [Nick Kew]

  *) mod_ldap: Avoid 500 errors with "Unable to set LDAP_OPT_REFHOPLIMIT option to 5"
     when built against openldap by using SDK LDAP_OPT_REFHOPLIMIT defaults unless
     LDAPReferralHopLimit is explicitly configured.
     [Eric Covener]

  *) mod_charset_lite: Honor 'CharsetOptions NoImplicitAdd'.
     [Eric Covener]

  *) mod_ssl: Add support for OCSP Stapling.  PR 43822.
     [Dr Stephen Henson <shenson oss-institute.org>]

  *) mod_socache_shmcb: Allow parens in file name if cache size is given.
     Fixes SSLSessionCache directive mis-parsing parens in pathname.
     PR 47945. [Stefan Fritsch]

  *) htpasswd: Improve out of disk space handling. PR 30877. [Stefan Fritsch]

  *) htpasswd: Use MD5 hash by default on all platforms. [Stefan Fritsch]

  *) mod_sed: Reduce memory consumption when processing very long lines.
     PR 48024 [Basant Kumar Kukreja <basant.kukreja sun.com>]

  *) ab: Fix segfault in case the argument for -n is a very large number.
     PR 47178. [Philipp Hagemeister <oss phihag.de>]

  *) Allow ProxyPreserveHost to work in <Proxy> sections. PR 34901.
     [Stefan Fritsch]

  *) configure: Fix THREADED_MPMS so that mod_cgid is enabled again
     for worker MPM. [Takashi Sato]

  *) mod_dav: Provide a mechanism to obtain the request_rec and pathname
     from the dav_resource. [Jari Urpalainen <jari.urpalainen nokia.com>,
     Brian France <brian brianfrance.com>]

  *) Build: Use install instead of cp if available on installing
     modules to avoid segmentation fault. PR 47951. [hirose31 gmail.com]

  *) mod_cache: correctly consider s-maxage in cacheability
     decisions.  [Dan Poirier]

  *) mod_logio/core: Report more accurate byte counts in mod_status if
     mod_logio is loaded. PR 25656. [Stefan Fritsch]

  *) mod_ldap: If LDAPSharedCacheSize is too small, try harder to purge
     some cache entries and log a warning. Also increase the default
     LDAPSharedCacheSize to 500000. This is a more realistic size suitable
     for the default values of 1024 for LdapCacheEntries/LdapOpCacheEntries.
     PR 46749. [Stefan Fritsch]

  *) mod_rewrite: Make sure that a hostname:port isn't fully qualified if
     the request is a CONNECT request. [Bill Zajac <billz consultla.com>]

  *) mod_cache: Teach CacheEnable and CacheDisable to work from within a
     Location section, in line with how ProxyPass works. [Graham Leggett]

  *) mod_reqtimeout: New module to set timeouts and minimum data rates for
     receiving requests from the client. [Stefan Fritsch]

  *) core: Fix potential memory leaks by making sure to not destroy
     bucket brigades that have been created by earlier filters.
     [Stefan Fritsch]

  *) core, mod_deflate, mod_sed: Reduce memory usage by reusing bucket
     brigades in several places. [Stefan Fritsch]

  *) mod_cache: Fix uri_meets_conditions() so that CacheEnable will
     match by scheme, or by a wildcarded hostname. PR 40169
     [Peter Grandi <pg_asf asf.for.sabi.co.uk>, Graham Leggett]

  *) suxec: Allow to log an error if exec fails by setting FD_CLOEXEC
     on the log file instead of closing it. PR 10744. [Nicolas Rachinsky]

  *) mod_mime: Make RemoveType override the info from TypesConfig.
     PR 38330. [Stefan Fritsch]

  *) mod_cache: Introduce the option to run the cache from within the
     normal request handler, and to allow fine grained control over
     where in the filter chain content is cached. Adds CacheQuickHandler
     directive.  [Graham Leggett]

  *) core: Treat timeout reading request as 408 error, not 400.
     Log 408 errors in access log as was done in Apache 1.3.x.
     PR 39785 [Nobutaka Mantani <nobutaka nobutaka.org>,
     Stefan Fritsch <sf fritsch.de>, Dan Poirier]

  *) mod_ssl: Reintroduce SSL_CLIENT_S_DN, SSL_CLIENT_I_DN, SSL_SERVER_S_DN,
     SSL_SERVER_I_DN back to the environment variables to be set by mod_ssl.
     [Peter Sylvester <peter.sylvester edelweb.fr>]

  *) mod_disk_cache: don't cache incomplete responses, per RFC 2616, 13.8.
     PR15866.  [Dan Poirier]

  *) ab: ab segfaults in verbose mode on https sites
     PR46393.  [Ryan Niebur]

  *) mod_dav: Allow other modules to become providers and add resource types
     to the DAV response. [Jari Urpalainen <jari.urpalainen nokia.com>,
     Brian France <brian brianfrance.com>]

  *) mod_dav: Allow other modules to add things to the DAV or Allow headers
     of an OPTIONS request. [Jari Urpalainen <jari.urpalainen nokia.com>,
     Brian France <brian brianfrance.com>]

  *) core: Lower memory usage of core output filter.
     [Stefan Fritsch <sf sfritsch.de>]

  *) mod_mime: Detect invalid use of MultiviewsMatch inside Location and
     LocationMatch sections.  PR47754. [Dan Poirier]

  *) mod_request: Make sure the KeptBodySize directive rejects values
     that aren't valid numbers. [Graham Leggett]

  *) mod_session_crypto: Sanity check should the potentially encrypted
     session cookie be too short. [Graham Leggett]

  *) mod_session.c: Prevent a segfault when session is added but not
     configured. [Graham Leggett]

  *) htcacheclean: 19 ways to fail, 1 error message. Fixed. [Graham Leggett]

  *) mod_auth_digest: Fail server start when nonce count checking
     is configured without shared memory, or md5-sess algorithm is
     configured. [Dan Poirier]

  *) mod_proxy_connect: The connect method doesn't work if the client is
     connecting to the apache proxy through an ssl socket. Fixed.
     PR29744. [Brad Boyer, Mark Cave-Ayland, Julian Gilbey, Fabrice Durand,
     David Gence, Tim Dodge, Per Gunnar Hans, Emmanuel Elango,
     Kevin Croft, Rudolf Cardinal]

  *) mod_ssl: The error message when SSLCertificateFile is missing should
     at least give the name or position of the problematic virtual host
     definition. [Stefan Fritsch sf sfritsch.de]

  *) mod_auth_digest: Fix null pointer when qop=none. [Dan Poirier]

  *) Add support for HTTP PUT to ab. [Jeff Barnes <jbarnesweb yahoo.com>]

  *) mod_headers: generalise the envclause to support expression
     evaluation with ap_expr parser [Nick Kew]

  *) mod_cache: Introduce the thundering herd lock, a mechanism to keep
     the flood of requests at bay that strike a backend webserver as
     a cached entity goes stale. [Graham Leggett]

  *) mod_auth_digest: Fix usage of shared memory and re-enable it.
     PR 16057 [Dan Poirier]

  *) Preserve Port information over internal redirects
     PR 35999 [Jonas Ringh <jonas.ringh cixit.se>]

  *) Proxy: unable to connect to a backend is SERVICE_UNAVAILABLE,
     rather than BAD_GATEWAY or (especially) NOT_FOUND.
     PR 46971 [evanc nortel.com]

  *) Various modules: Do better checking of pollset operations in order to
     avoid segmentation faults if they fail. PR 46467
     [Stefan Fritsch <sf sfritsch.de>]

  *) mod_autoindex: Correctly create an empty cell if the description
     for a file is missing. PR 47682 [Peter Poeml <poeml suse.de>]

  *) ab: Fix broken error messages after resolver or connect() failures.
     [Jeff Trawick]

  *) SECURITY: CVE-2009-1890 (cve.mitre.org)
     Fix a potential Denial-of-Service attack against mod_proxy in a
     reverse proxy configuration, where a remote attacker can force a
     proxy process to consume CPU time indefinitely.  [Nick Kew, Joe Orton]

  *) SECURITY: CVE-2009-1191 (cve.mitre.org)
     mod_proxy_ajp: Avoid delivering content from a previous request which
     failed to send a request body. PR 46949 [Ruediger Pluem]

  *) htdbm: Fix possible buffer overflow if dbm database has very
     long values.  PR 30586 [Dan Poirier]

  *) core: Return APR_EOF if request body is shorter than the length announced
     by the client. PR 33098 [ Stefan Fritsch <sf sfritsch.de>]

  *) mod_suexec: correctly set suexec_enabled when httpd is run by a
     non-root user and may have insufficient permissions.
     PR 42175 [Jim Radford <radford blackbean.org>]

  *) mod_ssl: Fix SSL_*_DN_UID variables to use the 'userID' attribute
     type.  PR 45107.  [Michael Ströder <michael stroeder.com>,
     Peter Sylvester <peter.sylvester edelweb.fr>]

  *) mod_proxy_http: fix case sensitivity checking transfer encoding
     PR 47383 [Ryuzo Yamamoto <ryuzo.yamamoto gmail.com>]

  *) mod_alias: ensure Redirect issues a valid URL.
     PR 44020 [Håkon Stordahl <hakon stordahl.org>]

  *) mod_dir: add FallbackResource directive, to enable admin to specify
     an action to happen when a URL maps to no file, without resorting
     to ErrorDocument or mod_rewrite.  PR 47184 [Nick Kew]

  *) mod_cgid: Do not leak the listening Unix socket file descriptor to the
     CGI process. PR 47335 [Kornél Pál <kornelpal gmail.com>]

  *) mod_rewrite: Remove locking for writing to the rewritelog.
     PR 46942 [Dan Poirier <poirier pobox.com>]

  *) mod_alias: check sanity in Redirect arguments.
     PR 44729 [Sönke Tesch <st kino-fahrplan.de>, Jim Jagielski]

  *) mod_proxy_http: fix Host: header for literal IPv6 addresses.
     PR 47177 [Carlos Garcia Braschi <cgbraschi gmail.com>]

  *) mod_cache: Add CacheIgnoreURLSessionIdentifiers directive to ignore
     defined session identifiers encoded in the URL when caching.
     [Ruediger Pluem]

  *) mod_rewrite: Fix the error string returned by RewriteRule.
     RewriteRule returned "RewriteCond: bad flag delimiters" when the 3rd
     argument of RewriteRule was not started with "[" or not ended with "]".
     PR 45082 [Vitaly Polonetsky <m_vitaly topixoft.com>]

  *) Windows: Fix usage message.
     [Rainer Jung]

  *) apachectl: When passing through arguments to httpd in
     non-SysV mode, use the "$@" syntax to preserve arguments.
     [Eric Covener]

  *) mod_dbd: add DBDInitSQL directive to enable SQL statements to
     be run when a connection is opened.  PR 46827
     [Marko Kevac <mkevac gmail.com>]

  *) mod_cgid: Improve handling of long AF_UNIX socket names (ScriptSock).
     PR 47037.  [Jeff Trawick]

  *) mod_proxy_ajp: Check more strictly that the backend follows the AJP
     protocol. [Mladen Turk]

  *) mod_proxy_ajp: Forward remote port information by default.
     [Rainer Jung]

  *) Allow MPMs to be loaded dynamically, as with most other modules.  Use
     --enable-mpms-shared={list|"all"} to enable.  This required changes to
     the MPM interfaces.  Removed: mpm.h, mpm_default.h (as an installed
     header), APACHE_MPM_DIR, MPM_NAME, ap_threads_per_child,
     ap_max_daemons_limit, ap_my_generation, etc.  ap_mpm_query() can't be
     called until after the register-hooks phase.  [Jeff Trawick]

  *) mod_ssl: Add SSLProxyCheckPeerExpire and SSLProxyCheckPeerCN directives
     to enable stricter checking of remote server certificates.
     [Ruediger Pluem]

  *) ab: Fix a 100% CPU loop on platforms where a failed non-blocking connect
     returns EINPROGRESS and a subsequent poll() returns only POLLERR.
     Observed on HP-UX.  [Eric Covener]

  *) Remove broken support for BeOS, TPF, and even older platforms such
     as A/UX, Next, and Tandem.  [Jeff Trawick]

  *) mod_proxy_ftp: Add ProxyFtpListOnWildcard directive to allow files with
     globbing characters to be retrieved instead of converted into a
     directory listing.  PR 46789 [Dan Poirier <poirier pobox.com>]

  *) Provide ap_retained_data_create()/ap_retained_data_get() for preservation
     of module state across unload/load.  [Jeff Trawick]

  *) mod_substitute: Fix a memory leak. PR 44948
     [Dan Poirier <poirier pobox.com>]

Changes with Apache 2.3.2

  *) mod_mime_magic: Fix detection of compressed content. [Rainer Jung]

  *) mod_negotiation: Escape paths of filenames in 406 responses to avoid
     HTML injections and HTTP response splitting.  PR 46837.
     [Geoff Keating <geoffk apple.com>]

  *) mod_ssl: add support for type-safe STACK constructs in OpenSSL
     development HEAD.  PR 45521.  [Kaspar Brand, Sander Temme]

  *) ab: Fix maintenance of the pollset to resolve EALREADY errors
     with kqueue (BSD/OS X) and excessive CPU with event ports (Solaris).
     PR 44584.  Use APR_POLLSET_NOCOPY for better performance with some
     pollset implementations.  [Jeff Trawick]

  *) mod_disk_cache: The module now turns off sendfile support if
     'EnableSendfile off' is defined globally. [Lars Eilebrecht]

  *) mod_deflate: Adjust content metadata before bailing out on 304
     responses so that the metadata does not differ from 200 response.
     [Roy T. Fielding]

  *) mod_deflate: Fix creation of invalid Etag headers. We now make sure
     that the Etag value is properly quoted when adding the gzip marker.
     PR 39727, 45023. [Lars Eilebrecht, Roy T. Fielding]

  *) Added 20x22 icons for ODF, SVG, and XML documents.  PR 37185.
     [Peter Harlow]

  *) Disabled DefaultType directive and removed ap_default_type()
     from core.  We now exclude Content-Type from responses for which
     a media type has not been configured via mime.types, AddType,
     ForceType, or some other mechanism. PR 13986. [Roy T. Fielding]

  *) mod_rewrite: Add IPV6 variable to RewriteCond
     [Ryan Phillips <ryan-apache trolocsis.com>]

  *) core: Enhance KeepAliveTimeout to support a value in milliseconds.
     PR 46275. [Takashi Sato]

  *) rotatelogs: Allow size units B, K, M, G and combination of
     time and size based rotation. [Rainer Jung]

  *) rotatelogs: Add flag for verbose (debug) output. [Rainer Jung]

  *) mod_ssl: Fix merging of SSLRenegBufferSize directive. PR 46508
     [<tlhackque yahoo.com>]

  *) core: Translate the the status line to ASCII on EBCDIC platforms in
     ap_send_interim_response() and for locally generated "100 Continue"
     responses.  [Eric Covener]

  *) prefork: Fix child process hang during graceful restart/stop in
     configurations with multiple listening sockets.  PR 42829.  [Joe Orton,
     Jeff Trawick]

  *) mod_session_crypto: Ensure that SessionCryptoDriver can only be
     set in the global scope. [Graham Leggett]

  *) mod_ext_filter: We need to detect failure to startup the filter
     program (a mangled response is not acceptable).  Fix to detect
     failure, and offer configuration option either to abort or
     to remove the filter and continue.
     PR 41120 [Nick Kew]

  *) mod_session_crypto: Rewrite the session_crypto module against the
     apr_crypto API. [Graham Leggett]

  *) mod_auth_form: Fix a pool lifetime issue, don't remove the subrequest
     until the main request is cleaned up. [Graham Leggett]

Changes with Apache 2.3.1

  *) ap_slotmem: Add in new slot-based memory access API impl., including
     2 providers (mod_sharedmem and mod_plainmem) [Jim Jagielski,
     Jean-Frederic Clere, Brian Akins <brian.akins turner.com>]

  *) mod_include: support generating non-ASCII characters as entities in SSI
     PR 25202 [Nick Kew]

  *) core/utils: Enhance ap_escape_html API to support escaping non-ASCII chars
     PR 25202 [Nick Kew]

  *) mod_rewrite: fix "B" flag breakage by reverting r5589343
    PR 45529 [Bob Ionescu <bobsiegen googlemail.com>]

  *) CGI: return 504 (Gateway timeout) rather than 500 when a script
     times out before returning status line/headers.
     PR 42190 [Nick Kew]

  *) mod_cgid: fix segfault problem on solaris.
     PR 39332 [Masaoki Kobayashi <masaoki techfirm.co.jp>]

  *) mod_proxy_scgi: Added. [André Malo]

  *) mod_cache: Introduce 'no-cache' per-request environment variable
     to prevent the saving of an otherwise cacheable response.
     [Eric Covener]

  *) mod_rewrite: Introduce DiscardPathInfo|DPI flag to stop the troublesome
     way that per-directory rewrites append the previous notion of PATH_INFO
     to each substitution before evaluating subsequent rules.
     PR 38642 [Eric Covener]

  *) mod_cgid: Do not add an empty argument when calling the CGI script.
     PR 46380 [Ruediger Pluem]

  *) scoreboard: Remove unused sb_type from process_score.
     [Torsten Foertsch <torsten.foertsch gmx.net>, Chris Darroch]

  *) mod_ssl: Add SSLRenegBufferSize directive to allow changing the
     size of the buffer used for the request-body where necessary
     during a per-dir renegotiation.  PR 39243.  [Joe Orton]

  *) mod_proxy_fdpass: New module to pass a client connection over to a separate
     process that is reading from a unix daemon socket.

  *) mod_ssl: Improve environment variable extraction to be more
     efficient and to correctly handle DNs with duplicate tags.
     PR 45975.  [Joe Orton]

  *) Remove the obsolete serial attribute from the RPM spec file. Compile
     against the external pcre. Add missing binaries fcgistarter, and
     mod_socache* and mod_session*. [Graham Leggett]

Changes with Apache 2.3.0

  *) mod_ratelimit: New module to do bandwidth rate limiting. [Paul Querna]

  *) Remove X-Pad header which was added as a work around to a bug in
     Netscape 2.x to 4.0b2. [Takashi Sato <takashi lans-tv.com>]

  *) Add DTrace Statically Defined Tracing (SDT) probes.
    [Theo Schlossnagle <jesus omniti.com>, Paul Querna]

  *) mod_proxy_balancer: Move all load balancing implementations
     as individual, self-contained mod_proxy submodules under
     modules/proxy/balancers [Jim Jagielski]

  *) Rename APIs to include ap_ prefix:
        find_child_by_pid -> ap_find_child_by_pid
        suck_in_APR -> ap_suck_in_APR
        sys_privileges_handlers -> ap_sys_privileges_handlers
        unixd_accept -> ap_unixd_accept
        unixd_config -> ap_unixd_config
        unixd_killpg -> ap_unixd_killpg
        unixd_set_global_mutex_perms -> ap_unixd_set_global_mutex_perms
        unixd_set_proc_mutex_perms -> ap_unixd_set_proc_mutex_perms
        unixd_set_rlimit -> ap_unixd_set_rlimit
     [Paul Querna]

  *) mod_lbmethod_heartbeat: New module to load balance mod_proxy workers
     based on heartbeats. [Paul Querna]

  *) mod_heartmonitor: New module to collect heartbeats, and write out a file
     so that other modules can load balance traffic as needed. [Paul Querna]

  *) mod_heartbeat: New module to generate multicast heartbeats to know if a
     server is online. [Paul Querna]

  *) mod_buffer: Honour the flush bucket and flush the buffer in the
     input filter. Make sure that metadata buckets are written to
     the buffer, not to the final brigade. [Graham Leggett]

  *) mod_buffer: Optimise the buffering of heap buckets when the heap
     buckets stay exactly APR_BUCKET_BUFF_SIZE long. [Graham Leggett,
     Ruediger Pluem]

  *) mod_buffer: Optional support for buffering of the input and output
     filter stacks. Can collapse many small buckets into fewer larger
     buckets, and prevents excessively small chunks being sent over
     the wire. [Graham Leggett]

  *) mod_privileges: new module to make httpd on Solaris privileges-aware
     and to enable different virtualhosts to run with different
     privileges and Unix user/group IDs [Nick Kew]

  *) mod_mem_cache: this module has been removed. [William Rowe]

  *) authn/z: Remove mod_authn_default and mod_authz_default.
     [Chris Darroch]

  *) authz: Fix handling of authz configurations, make default authz
     logic replicate 2.2.x authz logic, and replace <Satisfy*>, Reject,
     and AuthzMergeRules directives with Match, <Match*>, and AuthzMerge
     directives.  [Chris Darroch]

  *) mod_authn_core: Prevent crash when provider alias created to
     provider which is not yet registered.  [Chris Darroch]

  *) mod_authn_core: Add AuthType of None to support disabling
     authentication.  [Chris Darroch]

  *) core: Allow <Limit> and <LimitExcept> directives to nest, and
     constrain their use to conform with that of other access control
     and authorization directives.  [Chris Darroch]

  *) unixd: turn existing code into a module, and turn the set user/group
     and chroot into a child_init function. [Nick Kew]

  *) mod_dir: Support "DirectoryIndex disabled"
     Suggested By André Warnier <aw ice-sa.com> [Eric Covener]

  *) mod_ssl: Send Content-Type application/ocsp-request for POST requests to
     OSCP responders. PR 46014 [Dr Stephen Henson <steve openssl.org>]

  *) mod_authnz_ldap: don't return NULL-valued environment variables to
     other modules.  PR 39045 [Francois Pesce <francois.pesce gmail.com>]

  *) Don't adjust case in pathname components that are not of interest
     to mod_mime.  Fixes mod_negotiation's use of such components.
     PR 43250 [Basant Kumar Kukreja <basant.kukreja sun.com>]

  *) Be tolerant in what you accept - accept slightly broken
     status lines from a backend provided they include a valid status code.
     PR 44995 [Rainer Jung <rainer.jung kippdata.de>]

  *) New module mod_sed: filter Request/Response bodies through sed
     [Basant Kumar Kukreja <basant.kukreja sun.com>]

  *) mod_auth_form: Make sure that basic authentication is correctly
     faked directly after login. [Graham Leggett]

  *) mod_session_cookie, mod_session_dbd: Make sure cookies are set both
     within the output headers and error output headers, so that the
     session is maintained across redirects. [Graham Leggett]

  *) mod_auth_form: Make sure the logged in user is populated correctly
     after a form login. Fixes a missing REMOTE_USER variable directly
     following a login. [Graham Leggett]

  *) mod_session_cookie: Make sure that cookie attributes are correctly
     included in the blank cookie when cookies are removed. This fixes an
     inability to log out when using mod_auth_form. [Graham Leggett]

  *) mod_session: Prevent a segfault when a CGI script sets a cookie with a
     null value. [David Shane Holden <dpejesh apache.org>]

  *) core, authn/z: Determine registered authn/z providers directly in
     ap_setup_auth_internal(), which allows optional functions that just
     wrapped ap_list_provider_names() to be removed from authn/z modules.
     [Chris Darroch]

  *) authn/z: Convert common provider version strings to macros.
     [Chris Darroch]

  *) core: When testing for slash-terminated configuration paths in
     ap_location_walk(), don't look past the start of an empty string
     such as that created by a <Location ""> directive.
     [Chris Darroch]

  *) core, mod_proxy: If a kept_body is present, it becomes safe for
     subrequests to support message bodies. Make sure that safety
     checks within the core and within the proxy are not triggered
     when kept_body is present. This makes it possible to embed
     proxied POST requests within mod_include. [Graham Leggett]

  *) mod_auth_form: Make sure the input filter stack is properly set
     up before reading the login form. Make sure the kept body filter
     is correctly inserted to ensure the body can be read a second
     time safely should the authn be successful. [Graham Leggett,
     Ruediger Pluem]

  *) mod_request: Insert the KEPT_BODY filter via the insert_filter
     hook instead of during fixups. Add a safety check to ensure the
     filters cannot be inserted more than once. [Graham Leggett,
     Ruediger Pluem]

  *) ap_cache_cacheable_headers_out() will (now) always
     merge an error headers _before_ clearing them and _before_
     merging in the actual entity headers and doing normal
     hop-by-hop cleansing. [Dirk-Willem van Gulik].

  *) cache: retire ap_cache_cacheable_hdrs_out() which was used
     for both in- and out-put headers; and replace it by a single
     ap_cache_cacheable_headers() wrapped in a in- and out-put
     specific ap_cache_cacheable_headers_in()/out(). The latter
     which will also merge error and ensure content-type. To keep
     cache modules consistent with ease. This API change bumps
     up the minor MM by one [Dirk-Willem van Gulik].

  *) Move the KeptBodySize directive, kept_body filters and the
     ap_parse_request_body function out of the http module and into a
     new module called mod_request, reducing the size of the core.
     [Graham Leggett]

  *) mod_dbd: Handle integer configuration directive parameters with a
     dedicated function.

  *) Change the directives within the mod_session* modules to be valid
     both inside and outside the location/directory sections, as
     suggested by wrowe. [Graham Leggett]

  *) mod_auth_form: Add a module capable of allowing end users to log
     in using an HTML form, storing the credentials within mod_session.
     [Graham Leggett]

  *) Add a function to the http filters that is able to parse an HTML
     form request with the type of application/x-www-form-urlencoded.
     [Graham Leggett]

  *) mod_session_crypto: Initialise SSL in the post config hook.
     [Ruediger Pluem, Graham Leggett]

  *) mod_session_dbd: Add a session implementation capable of storing
     session information in a SQL database via the dbd interface. Useful
     for sites where session privacy is important. [Graham Leggett]

  *) mod_session_crypto: Add a session encoding implementation capable
     of encrypting and decrypting sessions wherever they may be stored.
     Introduces a level of privacy when sessions are stored on the
     browser. [Graham Leggett]

  *) mod_session_cookie: Add a session implementation capable of storing
     session information within cookies on the browser. Useful for high
     volume sites where server bound sessions are too resource intensive.
     [Graham Leggett]

  *) mod_session: Add a generic session interface to unify the different
     attempts at saving persistent sessions across requests.
     [Graham Leggett]

  *) core, authn/z: Avoid calling access control hooks for internal requests
     with configurations which match those of initial request.  Revert to
     original behaviour (call access control hooks for internal requests
     with URIs different from initial request) if any access control hooks or
     providers are not registered as permitting this optimization.
     Introduce wrappers for access control hook and provider registration
     which can accept additional mode and flag data.  [Chris Darroch]

  *) Introduced ap_expr API for expression evaluation.
     This is adapted from mod_include, which is the first module
     to use the new API.
     [Nick Kew]

  *) mod_authz_dbd: When redirecting after successful login/logout per
     AuthzDBDRedirectQuery, do not report authorization failure, and use
     first row returned by database query instead of last row.
     [Chris Darroch]

  *) mod_ldap: Correctly return all requested attribute values
     when some attributes have a null value.
     PR 44560 [Anders Kaseorg <anders kaseorg.com>]

  *) core: check symlink ownership if both FollowSymlinks and
     SymlinksIfOwnerMatch are set [Nick Kew]

  *) core: fix origin checking in SymlinksIfOwnerMatch
     PR 36783 [Robert L Mathews <rob-apache.org.bugs tigertech.net>]

  *) Activate mod_cache, mod_file_cache and mod_disk_cache as part of the
     'most' set for '--enable-modules' and '--enable-shared-mods'. Include
     mod_mem_cache in 'all' as well. [Dirk-Willem van Gulik]

  *) Also install mod_so.h, mod_rewrite.h and mod_cache.h; as these
     contain public function declarations which are useful for
     third party module authors. PR 42431 [Dirk-Willem van Gulik].

  *) mod_dir, mod_negotiation: pass the output filter information
     to newly created sub requests; as these are later on used
     as true requests with an internal redirect. This allows for
     mod_cache et.al. to trap the results of the redirect.
     [Dirk-Willem van Gulik, Ruediger Pluem]

  *) mod_ldap: Add support (taking advantage of the new APR capability)
     for ldap rebind callback while chasing referrals. This allows direct
     searches on LDAP servers (in particular MS Active Directory 2003+)
     using referrals without the use of the global catalog.
     PRs 26538, 40268, and 42557 [Paul J. Reder]

  *) ApacheMonitor.exe: Introduce --kill argument for use by the
     installer.  This will permit the installation tool to remove
     all running instances before attempting to remove the .exe.
     [William Rowe]

  *) mod_ssl: Add support for OCSP validation of client certificates.
     PR 41123.  [Marc Stern <marc.stern approach.be>, Joe Orton]

  *) mod_serf: New module for Reverse Proxying. [Paul Querna]