CHANGES

     [Scott Hill <shill genscape.com>]

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Changes with Apache 2.3.11

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Changes with Apache 2.3.10

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

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

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

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

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

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

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

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

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

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

Changes with Apache 2.3.9

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  *) core: Add ErrorLogFormat to allow configuring error log format, including
     additional information that is logged once per connection or request. Add
     error log IDs for connections and request to allow correlating error log
     lines and the corresponding access log entry. [Stefan Fritsch]

  *) core: Disable sendfile by default. [Stefan Fritsch]

  *) mod_cache: Check the request to determine whether we are allowed
     to return cached content at all, and respect a "Cache-Control:
     no-cache" header from a client. Previously, "no-cache" would
     behave like "max-age=0". [Graham Leggett]

  *) mod_cache: Use a proper filter context to hold filter data instead
     of misusing the per-request configuration. Fixes a segfault on trunk
     when the normal handler is used. [Graham Leggett]

  *) mod_cgid: Log a warning if the ScriptSock path is truncated because
     it is too long. PR 49388.  [Stefan Fritsch]

  *) vhosts: Do not allow _default_ in NameVirtualHost, or mixing *
     and non-* ports on NameVirtualHost, or multiple NameVirtualHost
     directives for the same address:port, or NameVirtualHost
     directives with no matching VirtualHosts, or multiple ip-based
     VirtualHost sections for the same address:port.  These were
     previously accepted with a warning, but the behavior was
     undefined.  [Dan Poirier]

  *) mod_remoteip: Fix a segfault when using mod_remoteip in conjunction with
     Allow/Deny. PR 49838.  [Andrew Skalski <voltara gmail.com>]

  *) core: DirectoryMatch can now match on the end of line character ($),
     and sub-directories of matched directories are no longer implicitly
     matched.  PR49809 [Eric Covener]

  *) Regexps: introduce new higher-level regexp utility including parsing
     and executing perl-style regexp ops (e.g s/foo/bar/i) and regexp memory
     [Nick Kew]

  *) Proxy: support setting source address.  PR 29404
     [Multiple contributors iterating through bugzilla,
      Aron Ujvari <xanco nikhok.hu>, Aleksey Midenkov <asm uezku.kemsu.ru>,
      <dan listening-station.net; trunk version Nick Kew]

  *) HTTP protocol: return 400 not 503 if we have to abort due to malformed
     chunked encoding. [Nick Kew]

Changes with Apache 2.3.8

  *) suexec: Support large log files. PR 45856. [Stefan Fritsch]

  *) core: Abort with sensible error message if no or more than one MPM is
     loaded. [Stefan Fritsch]

  *) mod_proxy: Rename erroronstatus to failonstatus.
     [Daniel Ruggeri <DRuggeri primary.net>]

  *) mod_dav_fs: Fix broken "creationdate" property.
     Regression in version 2.3.7. [Rainer Jung]

Changes with Apache 2.3.7

  *) SECURITY: CVE-2010-1452 (cve.mitre.org)
     mod_dav, mod_cache, mod_session: Fix Handling of requests without a path
     segment. PR 49246 [Mark Drayton, Jeff Trawick]

  *) mod_ldap: Properly check the result returned by apr_ldap_init. PR 46076.
     [Stefan Fritsch]

  *) mod_rewrite: Log errors if rewrite map files cannot be opened. PR 49639.
     [Stefan Fritsch]

  *) mod_proxy_http: Support the 'ping' property for backend HTTP/1.1 servers
     via leveraging 100-Continue as the initial "request".
     [Jim Jagielski]

  *) core/mod_authz_core: Introduce new access_checker_ex hook that enables
     mod_authz_core to bypass authentication if access should be allowed by
     IP address/env var/... [Stefan Fritsch]

  *) core: Introduce note_auth_failure hook to allow modules to add support
     for additional auth types. This makes ap_note_auth_failure() work with
     mod_auth_digest again. PR 48807. [Stefan Fritsch]

  *) socache modules: return APR_NOTFOUND when a lookup is not found [Nick Kew]

  *) mod_authn_socache: new module [Nick Kew]

  *) configure: Add reallyall option for --enable-mods-shared. [Stefan Fritsch]

  *) Fix Windows build when using VC6. [Gregg L. Smith <lists glewis com>]

  *) mod_rewrite: Allow to set environment variables without explicitly
     giving a value. [Rainer Jung]

  *) mod_rewrite: Remove superfluous EOL from rewrite logging. [Rainer Jung]

  *) mod_include: recognise "text/html; parameters" as text/html
     PR 49616 [Andrey Chernov <ache nagual.pp.ru>]

  *) CGI vars: allow PATH to be set by SetEnv, consistent with LD_LIBRARY_PATH
     PR 43906 [Nick Kew]

  *) Core: Extra robustness: don't try authz and segfault if authn
     fails to set r->user.  Log bug and return 500 instead.
     PR 42995 [Nick Kew]

  *) HTTP protocol filter: fix handling of longer chunk extensions
     PR 49474 [<tee.bee gmx.de>]

  *) Update SSL cipher suite and add example for SSLHonorCipherOrder.
     [Lars Eilebrecht, Rainer Jung]

  *) move AddOutputFilterByType from core to mod_filter.  This should
     fix nasty side-effects that happen when content_type is set
     more than once in processing a request, and make it fully
     compatible with dynamic and proxied contents. [Nick Kew]

  *) mod_log_config: Implement logging for sub second timestamps and
     request end time.  [Rainer Jung]

Changes with Apache 2.3.6

  *) SECURITY: CVE-2009-3555 (cve.mitre.org)
     mod_ssl: Comprehensive fix of the TLS renegotiation prefix injection
     attack when compiled against OpenSSL version 0.9.8m or later. Introduces
     the 'SSLInsecureRenegotiation' directive to reopen this vulnerability
     and offer unsafe legacy renegotiation with clients which do not yet
     support the new secure renegotiation protocol, RFC 5746.
     [Joe Orton, and with thanks to the OpenSSL Team]

  *) SECURITY: CVE-2009-3555 (cve.mitre.org)
     mod_ssl: A partial fix for the TLS renegotiation prefix injection attack
     by rejecting any client-initiated renegotiations. Forcibly disable
     keepalive for the connection if there is any buffered data readable. Any
     configuration which requires renegotiation for per-directory/location
     access control is still vulnerable, unless using OpenSSL >= 0.9.8l.
     [Joe Orton, Ruediger Pluem, Hartmut Keil <Hartmut.Keil adnovum.ch>]

  *) SECURITY: CVE-2010-0408 (cve.mitre.org)
     mod_proxy_ajp: Respond with HTTP_BAD_REQUEST when the body is not sent
     when request headers indicate a request body is incoming; not a case of
     HTTP_INTERNAL_SERVER_ERROR.  [Niku Toivola <niku.toivola sulake.com>]

  *) SECURITY: CVE-2010-0425 (cve.mitre.org)
     mod_isapi: Do not unload an isapi .dll module until the request
     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.