CHANGES

                                                        -*- coding: utf-8 -*-
Changes with Apache 2.3.0
  [Remove entries to the current 2.0 and 2.2 section below, when backported]

  *) netware MPM: Destroy pmain pool when exiting ap_mpm_run() so that
     cleanups registered in modules' child_init hooks are performed.
     [Chris Darroch]

  *) mod_dbd: Handle error conditions in dbd_construct() properly.
     Simplify ap_dbd_open() and use correct arguments to apr_dbd_error()
     when non-threaded.  Register correct cleanup data in non-threaded
     ap_dbd_acquire() and ap_dbd_cacquire().  Clean up configuration data
     and merge function.  Use ap_log_error() wherever possible.
     [Chris Darroch, Nick Kew]

  *) mod_proxy_http: Handle request bodies larger than 2 GB by converting
     the Content-Length header of the request correctly. PR 40883.
     [Ruediger Pluem, toadie <toadie643 gmail.com>]

  *) core: Do not replace a Date header set by a proxied backend server.
     PR 40232. [Ruediger Pluem]

  *) mod_proxy: Ensure that at least scheme://hostname[:port] matches between
     worker and URL when searching for the best fitting worker for a given URL.
     PR 40910. [Ruediger Pluem]

  *) mod_cache: Remove expired content from cache that cannot be revalidated.
     PR 30370. [Ruediger Pluem]

  *) mod_dbd: Stash DBD connections in request_config of initial request
     only, or else sub-requests and internal redirections may cause
     entire DBD pool to be stashed in a single HTTP request.  [Chris Darroch]

  *) mod_cache: Correctly cache objects whose URL query string has been
     modified by mod_rewrite. PR 40805. [Ruediger Pluem]

  *) mod_proxy: Add a missing assignment in an error checking code path.
     PR 40865. [Andrew Rucker Jones <arjones simultan.dyndns.org>]

  *) mod_mem_cache: Increase the minimum and default value for
     MCacheMinObjectSize from 0 to 1, as a MCacheMinObjectSize of 0 does not
     make sense and leads to a division by zero.  PR 40576.
     [Xuekun Hu <xuekun.hu gmail.com>]

  *) mod_cache: Pass the output filter stack through the store_body()
     hook, giving each cache backend the ability to make a better
     decision as to how it will allocate the tasks of writing to the
     cache and writing to the network. Previously the write to the
     cache task needed to be complete before the same brigade was
     written to the network, and this caused timing and memory issues
     on large cached files. This fix replaces the previous fix for this
     PR below. PR39380 [Graham Leggett]

  *) Fix issue which could cause error messages to be written to access logs
     on Win32.  PR 40476.  [Tom Donovan <Tom.Donovan acm.org>]

  *) The LockFile directive, which specifies the location of
     the accept() mutex lockfile, is depreciated. Instead, the
     AcceptMutex directive now takes an optional lockfile
     location parameter, ala SSLMutex. [Jim Jagielski]

  *) mod_authn_dbd: Export any additional columns queried in the SQL select
     into the environment with the name AUTHENTICATE_<COLUMN>. This brings
     mod_authn_dbd behaviour in line with mod_authnz_ldap. [Graham Leggett]

  *) mod_dbd: Key the storage of prepared statements on the hex string
     value of server_rec, rather than the server name, as the server name
     may change (eg when the server name is set) at any time, causing
     weird behaviour in modules dependent on mod_dbd. [Graham Leggett]

  *) mod_proxy_fcgi: Added win32 build. [Mladen Turk]

  *) mod_disk_cache: Implement read-while-caching.
     [Niklas Edmundsson <nikke acc.umu.se>]

  *) mod_disk_cache: NULL fd pointers when closing them, fix missing
     close/flush, remove some unneccessary code duplication instead
     of calling the right helper in replace_brigade_with_cache().
     [Niklas Edmundsson <nikke acc.umu.se>]

  *) sendfile_nonblocking() takes the _brigade_ as an argument, gets 
     the first bucket from the brigade, finds it not to be a FILE
     bucket and barfs. The fix is to pass a bucket rather than a brigade.
     [Niklas Edmundsson <nikke acc.umu.se>]

  *) mod_disk_cache: Do away with the write-to-file-then-move-in-place
     mentality. [Niklas Edmundsson <nikke acc.umu.se>]

  *) mod_rewrite: support rewritemap by SQL query [Nick Kew]

  *) mod_disk_cache: Make caching of large files possible on 32bit machines
     by determining whether the cached file should be copied on disk rather
     than loaded into RAM. PR39380 [Niklas Edmundsson <nikke acc.umu.se>]

  *) mod_proxy: Print the correct error message for erroneous configured
     ProxyPass directives. PR 40439. [serai lans-tv.com]

  *) ap_get_server_version() has been removed.  Third-party modules must 
     now use ap_get_server_banner() or ap_get_server_description().
     [Jeff Trawick]

  *) All MPMs: Introduce a check_config phase between pre_config and
     open_logs, to allow modules to review interdependent configuration
     directive values and adjust them while messages can still be logged
     to the console.  Handle relevant MPM directives during this phase
     and format messages for both the console and the error log, as
     appropriate.  [Chris Darroch]

  *) mod_proxy: don't URLencode tilde in path component
     [Stijn Hoop <stijn sandcat.nl>]

  *) mpm_winnt: Fix return values from wait_for_many_objects.
     The return value is index to the signaled thread in the
     creted_threads array. We can not use WAIT_TIMEOUT because
     his value is defined as 258, thus limiting the MaxThreads
     to that value. [Mladen Turk]

  *) mod_cache: While serving a cached entity ensure that filters that have
     been applied to this cached entity before saving it to the cache are not
     applied again. PR 40090. [Ruediger Pluem]

  *) core: Do not allow internal redirects like the DirectoryIndex of mod_dir
     to circumvent the symbolic link checks imposed by FollowSymLinks and
     SymLinksIfOwnerMatch. [Nick Kew, Ruediger Pluem, William Rowe]

  *) mod_proxy: Support environment variable interpolation in reverse
     proxying directives. [Nick Kew]

  *) core: Add the filename of the configuration file to the warning message
     about the useless use of AllowOverride. PR 39992.
     [Darryl Miles <darryl darrylmiles.org>]

  *) New SSLLogLevelDebugDump [ None (default) | IO (not bytes) | Bytes ]
     configures the I/O Dump of SSL traffic, when LogLevel is set to Debug.
     The default is none as this is far greater debugging resolution than 
     the typical administrator is prepared to untangle.  [William Rowe]

  *) mod_disk_cache: If possible, check if the size of an object to cache is
     within the configured boundaries before actually saving data.
     [Niklas Edmundsson <nikke acc.umu.se>]

  *) mod_cache: Convert all values to seconds before comparing them when
     checking whether to send a Warning header for a stale response.
     PR 39713. [Owen Taylor <otaylor redhat.com>]

  *) mod_disk_cache: Delete temporary files if they cannot be renamed to their
     final name. [Davi Arnaut <davi haxent.com.br>]

  *) Worker and event MPMs: Remove improper scoreboard updates which were
     performed in the event of a fork() failure.  [Chris Darroch]

  *) Add support for fcgi:// proxies to mod_rewrite.
     [Markus Schiegl <ms schiegl.com>]

  *) Remove incorrect comments from scoreboard.h regarding conditional
     loading of worker_score structure with mod_status, and remove unused
     definitions relating to old life_status field.
     [Chris Darroch <chrisd pearsoncmg.com>]

  *) Remove allocation of memory for unused array of lb_score pointers
     in ap_init_scoreboard().  [Chris Darroch <chrisd pearsoncmg.com>]

  *) Add mod_proxy_fcgi, a FastCGI back end for mod_proxy.
     [Garrett Rooney, Jim Jagielski, Paul Querna]

  *) Event MPM: Fill in the scoreboard's tid field. PR 38736.
     [Chris Darroch <chrisd pearsoncmg.com>]

  *) mod_charset_lite: Remove Content-Length when output filter can 
     invalidate it.  Warn when input filter can invalidate it.
     [Jeff Trawick]

  *) mod_ssl: Fix spurious hostname mismatch warning for valid
     wildcard certificates.  PR 37911.  [Nick Burch <nick torchbox.com>]

  *) Authz: Add the new module mod_authn_core that will provide common
     authn directives such as 'AuthType', 'AuthName'.  Move the directives
     'AuthType' and 'AuthName' out of the core module and merge mod_authz_alias 
     into mod_authn_core. [Brad Nicholes]

  *) Authz: Mark the directives 'Order', 'Allow', 'Deny' and 'Satisfy' as 
     deprecated and move them into the new module mod_access_compat which
     can be loaded to provide backwards compatibility for these directives.
     [Brad Nicholes]

  *) Authz: Move the 'Require' directive from the core module as well as 
     add the directives '<SatisfyAll>', '<SatisfyOne>', '<RequireAlias>' 
     and 'Reject' to mod_authz_core. The new directives introduce 'AND/OR' 
     logic into the authorization processing. [Brad Nicholes]

  *) Authz: Add the new module mod_authz_core which acts as the 
     authorization provider vector and contains common authz 
     directives. [Brad Nicholes]

  *) Authz: Renamed mod_authz_dbm authz providers from 'group' and 
     'file-group' to 'dbm-group' and 'dbm-file-group'. [Brad Nicholes]

  *) Authz: Added the new authz providers 'env', 'ip', 'host', 'all' to handle
     host-based access control provided by mod_authz_host and invoked 
     through the 'Require' directive. [Brad Nicholes]

  *) Authz: Convert all of the authz modules from hook based to 
     provider based. [Brad Nicholes]

  *) mod_cache: Add CacheMinExpire directive to set the minimum time in
     seconds to cache a document.
     [Brian Akins <brian.akins turner.com>, Ruediger Pluem]

  *) mod_authz_dbd: SQL authz with Login/Session support [Nick Kew]

  *) Fix typo in ProxyStatus syntax error message.
     [Christophe Jaillet <christophe.jaillet wanadoo.fr>]

  *) Asynchronous write completion for the Event MPM.  [Brian Pane]

  *) Added an End-Of-Request bucket type.  The logging of a request and
     the freeing of its pool are now done when the EOR bucket is destroyed.
     This has the effect of delaying the logging until right after the last
     of the response is sent; ap_core_output_filter() calls the access logger
     indirectly when it destroys the EOR bucket.  [Brian Pane]

  *) Rewrite of logresolve support utility: IPv6 addresses are now supported
     and the format of statistical output has changed. [Colm MacCarthaigh]

  *) Rewrite of ap_coreoutput_filter to do nonblocking writes  [Brian Pane]

  *) Added new connection states for handler and write completion
     [Brian Pane]

  *) mod_cgid: Refuse to work on Solaris 10 due to OS bugs.  PR 34264.
     [Justin Erenkrantz]

  *) Teach mod_ssl to use arbitrary OIDs in an SSLRequire directive,
     allowing string-valued client certificate attributes to be used for
     access control, as in: SSLRequire "value" in OID("1.3.6.1.4.1.18060.1")
     [Martin Kraemer, David Reid]

Changes with Apache 2.2.4

  *) Allow htcacheclean, httxt2dbm, and fcgistarter to link apr/apr-util
     statically like the older support programs.
     [Eric Covener <covener gmail.com>]

  *) core: Fix NONBLOCK status of listening sockets on restart/graceful
     PR 37680.  [Darius Davis <darius-abz free-range.com.au>]

  *) mod_deflate: Rework inflate output and deflate output filter to fix several
     issues: Incorrect handling of flush buckets, potential memory leaks,
     excessive memory usage in inflate output filter for large compressed
     content. PR 39854. [Ruediger Pluem, Nick Kew, Justin Erenkrantz]

  *) mod_mem_cache: Memory leak fix: Unconditionally free the buffer.
     [Davi Arnaut <davi haxent.com.br>]

  *) Allow mod_dumpio to log at other than DEBUG levels via
     the new DumpIOLogLevel directive. [Jim Jagielski]

  *) rotatelogs: Improve error message for open failures.  PR 39487.
     [Joe Orton]

  *) Better detection and clean up of ldap connection that has been
     terminated by the ldap server.  PR 40878.
     [Rob Baily <rbaily servicebench com>]

  *) mod_mem_cache: Convert mod_mem_cache to use APR memory pool functions
     by creating a root pool for object persistence across requests. This
     also eliminates the need for custom serialization code.
     [Davi Arnaut <davi haxent.com.br>]

  *) mod_authnz_ldap: Add an AuthLDAPRemoteUserAttribute directive. If
     set, REMOTE_USER will be set to this attribute, rather than the
     username supplied by the user. Useful for example when you want users
     to log in using an email address, but need to supply a userid instead
     to the backend.  [Graham Leggett]

  *) mod_cgi and mod_cgid: Don't use apr_status_t error return
     from input filters as HTTP return value from the handler.
     PR 31579.  [Nick Kew]

  *) mod_cache: Eliminate a bogus error in the log when a filter returns
     AP_FILTER_ERROR.  [Niklas Edmundsson <nikke acc.umu.se>]

  *) core: Fix issue which could cause piped loggers to be orphaned and never
     terminate after a graceful restart.  PR 40651.  [Joe Orton, Ruediger Pluem]

  *) core: Fix address-in-use startup failure caused by corruption of the list of
     listen sockets in some configurations with multiple generic Listen
     directives.  [Jeff Trawick]

  *) mod_headers: Support regexp-based editing of HTTP headers.  [Nick Kew]

  *) mod_proxy: Add explicit flushing feature. When Servlet container sends AJP
     body message with size 0, this means that Servlet container has asked for
     an explicit flush. Create flush bucket in that case. This feature has been
     added to the recent Tomcat versions without breaking the AJP protocol.
     [Mladen Turk]

  *) mod_proxy_balancer: Set the new environment variable BALANCER_ROUTE_CHANGED
     if a worker with a route different from the one supplied by the client
     had been chosen or if the client supplied no routing information for
     a balancer with sticky sessions. [Ruediger Pluem]

  *) mod_proxy_balancer: Add information about the route, the sticky session
     and the worker used during a request as environment variables. PR 39806.
     [Brian <brectanu gmail.com>]

  *) mod_proxy: Don't try to use dead backend connection. PR 37770.
     [Olivier BOEL <ob dorrboel.com>]

  *) mod_proxy_balancer: Extract stickysession routing information contained as
     parameter in the URL correctly. PR 40400.
     [Ruediger Pluem, Tomokazu Harada <harada sysrdc.ns-sol.co.jp>]

  *) mod_proxy_ajp: Added cping/cpong support for the AJP protocol.
     A new worker directive ping=timeout will cause CPING packet
     to be send expecting CPONG packet within defined timeout.
     In case the backend is too busy this will fail instead
     sending the full header.  [Mladen Turk]

  *) mod_cache: From RFC3986 (section 6.2.3.) if a URI contains an
     authority component and an empty path, the empty path is to be equivalent
     to "/". It explicitly cites the following four URIs as equivalents:
       http://example.com
       http://example.com/
       http://example.com:/
       http://example.com:80/
     [Davi Arnaut <davi haxent.com.br>]

  *) mod_cache: Don't cache requests with a expires date in the past;
     otherwise mod_cache will always try to cache the URL. This bug
     might lead to numerous rename() errors on win32 if the URL was
     previously cached.  [Davi Arnaut <davi haxent.com.br>]

  *) mod_disk_cache: Make sure that only positive integers are accepted
     for the CacheMaxFileSize and CacheMinFileSize parameters in the
     config file. PR39380.  [Niklas Edmundsson <nikke acc.umu.se>]

  *) core: Deal with the widespread use of apr_status_t return values
     as HTTP status codes, as documented in PR#31759 (a bug shared by
     the default handler, mod_cgi, mod_cgid, mod_proxy, and probably
     others). PR31759.  [Jeff Trawick, Ruediger Pluem, Joe Orton]

  *) mod_ext_filter: Handle filter names which include capital letters.
     PR 40323.  [Jeff Trawick]

  *) mod_isapi: Avoid double trailing slashes in HSE_REQ_MAP_URL_TO_PATH
     support.  Also corrects the slashes for Windows.  PR 15993.  [William Rowe]

  *) mod_isapi: Handle "HTTP/1.1 200 OK" style status lines correctly, the
     token parser worked while the resulting length was misinterpreted.
     PR 29098.  [Brock Bland <bbland serena.com>]

  *) mod_isapi: Return 0 (failure) for more of the various ap_pass_brigade
     attempts to stream the response at the client.  PR 30022.  [William Rowe]

  *) mod_isapi: Ensure we walk through all the methods the developer may have
     employed to report their HTTP status result code.
     PR 16637 30033 28089.  [Matt Lewandowsky <matt iamcode.net>, William Rowe]

  *) mod_echo: Fix precedence problem in if statement. PR 40658.
     [Larry Cipriani <lvc lucent.com>]

  *) mod_mime_magic: Fix precedence problem in if statement. PR 40656.
     [Larry Cipriani <lvc lucent.com>]

  *) The full server version information is now included in the error log at
     startup as well as server status reports, irrespective of the setting
     of the ServerTokens directive.  ap_get_server_version() is now 
     deprecated, and is replaced by ap_get_server_banner() and 
     ap_get_server_description().  [Jeff Trawick]

  *) mod_proxy_balancer: Workers can now be defined as part of
     a balancer cluster "set" in which members of a lower-numbered set
     are preferred over higher numbered ones.  [Jim Jagielski]

  *) mod_proxy_balancer: Workers can now be defined as "hot standby" which
     will only be used if all other workers are unusable (eg: in
     error or disabled). Also, the balancer-manager displays the election
     count and I/O counts of all workers.  [Jim Jagielski]

  *) mod_proxy_ajp: Close connection to backend if reading of request body
     fails. PR 40310.  [Ian Abel <ianabel mxtelecom.com>]

  *) mod_proxy_balancer: Retry worker chosen by route / redirect worker if
     it is in error state before sending "Service Temporarily Unavailable".
     PR 38962.  [Christian Boitel <cboitel lfdj.com>]

Changes with Apache 2.2.3

  *) SECURITY: CVE-2006-3747 (cve.mitre.org)
     mod_rewrite: Fix an off-by-one security problem in the ldap scheme
     handling.  For some RewriteRules this could lead to a pointer being
     written out of bounds.  Reported by Mark Dowd of McAfee.
     [Mark Cox]

  *) mod_authn_alias: Add a check to make sure that the base provider and the
     alias names are different and also that the alias has not been registered
     before. PR 40051. [Brad Nicholes]

  *) mod_authnz_ldap: Fix a problem with invalid auth error detection for LDAP
     client SDKs that don't support the LDAP_SECURITY_ERROR macro. PR 39529.
     [Ray Price <dohrayme yahoo.com>, Josh Fenlason <jfenlason ptc.com>]

  *) mod_cache: Do not overwrite the Content-Type in the cache, for
     successfully revalidated cached objects. PR 39647. [Ruediger Pluem]

  *) mod_speling: Add directive to deal with case corrections only
     and ignore other misspellings [Olivier Thereaux  <ot w3.org>]

  *) mod_dbd: Fix dependence on virtualhost configuration in
     defining prepared statements (possible segfault at startup
     in user modules such as mod_authn_dbd).  [Nick Kew]

  *) Add optional 'scheme://' prefix to ServerName directive,
     allowing correct determination of the canonical server URL
     for use behind a proxy or offload device handling SSL; fixing
     redirect generation in those cases. PR 33398. [Sander Temme]

  *) Added server_scheme field to server_rec for above. Minor MMN bump.
     [Sander Temme]

  *) mod_cache: Make caching of reverse SSL proxies possible again. PR 39593.
     [Ruediger Pluem, Joe Orton]

  *) Worker MPM: On graceless shutdown or restart, send signals to
     each worker thread to wake them up if they're polling on a
     Keep-Alive connection.  PR 38737.  [Chris Darroch]

  *) worker and event MPMs: fix excessive forking if fork() or child_init
     take a long time.  PR 39275.
     [Greg Ames, Jeff Trawick, Chris Darroch <chrisd pearsoncmg.com> ]

  *) configure: Add "--with-included-apr" flag to force use of the
     bundled version of APR at build time.  [Joe Orton]

  *) Respect GracefulShutdownTimeout in the worker and event MPMs.
     [Chris Darroch, Garrett Rooney]

  *) mod_mem_cache: Set content type correctly when delivering data from
     cache. PR 39266. [Ruediger Pluem]

  *) mod_autoindex: Fix filename escaping with FancyIndexing disabled.
     PR 38910.  [Robby Griffin <rmg terc.edu>]

  *) mod_charset_lite: Bypass translation when the source and dest charsets
     are the same. [Jeff Trawick]

Changes with Apache 2.2.2

  *) mod_deflate: Allow mod_deflate to handle internal redirects.
     [Brian J. France <list firehawksystems.com>]

  *) mod_proxy_balancer: Initialize members of a balancer correctly.
     PR 38227. [James A. Robinson <jim.robinson stanford.edu>]

  *) mod_proxy: Do not release connections from connection pool twice.
     PR 38793. [Ruediger Pluem, matthias <mk-asf gigacodes.de>]

  *) core: Prevent reading uninitialized memory while reading a line of
     protocol input.  PR 39282. [Davi Arnaut <davi haxent.com.br>]

  *) mod_dbd: Update defaults, improve error reporting.
     [Chris Darroch <chrisd pearsoncmg com>, Nick Kew]

  *) mod_dbd: Create own pool and mutex to avoid problem use of
     process pool in request processing.
     [Chris Darroch <chrisd pearsoncmg com>]

  *) HTML-escape the Expect error message.  Not classed as security as
     an attacker has no way to influence the Expect header a victim will
     send to a target site.  Reported by Thiago Zaninotti
     <thiango nstalker.com>. [Mark Cox]

  *) htdbm: Fix crash processing -d option in 64-bit mode on HP-UX.
     [Jeff Trawick]

  *) htdbm: Warn the user when adding a plaintext password on a platform
     where it wouldn't work with the server (i.e., anywhere that has
     crypt()).  [Jeff Trawick]

  *) mod_proxy: don't reuse a connection that may be to the wrong backend
     PR 39253 [Ruediger Pluem]

  *) Default handler: Don't return output filter apr_status_t values.
     PR 31759.  [Jeff Trawick, Ruediger Pluem, Joe Orton]

Changes with Apache 2.2.1

  *) SECURITY: CVE-2005-3357 (cve.mitre.org)
     mod_ssl: Fix a possible crash during access control checks if a
     non-SSL request is processed for an SSL vhost (such as the
     "HTTP request received on SSL port" error message when an 400 
     ErrorDocument is configured, or if using "SSLEngine optional").
     PR 37791.  [Rüdiger Plüm, Joe Orton]

  *) SECURITY: CVE-2005-3352 (cve.mitre.org)
     mod_imagemap: Escape untrusted referer header before outputting
     in HTML to avoid potential cross-site scripting.  Change also
     made to ap_escape_html so we escape quotes.  Reported by JPCERT.
     [Mark Cox]

  *) mod_proxy_ajp: Flushing of the output after each AJP chunk is now
     configurable at runtime via the 'flushpackets' and 'flushwait' worker
     params. Minor MMN bump. [Jim Jagielski]

  *) mod_proxy: Fix incorrect usage of local and shared worker init.
     PR 38403. [Jim Jagielski]

  *) mod_isapi: Fix compiler errors on Unix platforms.
     [William Rowe]

  *) mod_proxy_http: Send HTTP Keep-Alive Headers. PR 38524.
     [Rüdiger Plüm, Joe Orton]

  *) mod_disk_cache: Return the correct error codes from bucket read
     failures, instead of APR_EGENERAL.
     [Brian Akins <brian.akins turner.com>]

  *) Add APR/APR-Util Compiled and Runtime Version numbers to the
     output of 'httpd -V'. [William Rowe]

  *) http: If a connection is aborted while waiting for a chunked line,
     flag the connection as errored out.  [Justin Erenkrantz]

  *) core: Reject invalid Expect header immediately. PR 38123.
     [Ruediger Pluem]

  *) mod_proxy: Fix KeepAlives not being allowed and set to
     backend servers. PR 38602. [Ruediger Pluem, Jim Jagielski]

  *) mod_proxy: If we get an error reading the upstream response,
     close the connection.  [Justin Erenkrantz, Roy T. Fielding,
     Jim Jagielski, Ruediger Pluem]

  *) mod_proxy_ajp: Support common headers of the AJP protocol in responses.
     PR 38340. [Aleksey Pesternikov <apesternikov yahoo.com>]

  *) mod_proxy_balancer: Do not overwrite the status of initialized workers and
     respect the configured status of uninitilized workers when creating a new
     child process. [Ruediger Pluem]

  *) mod_proxy_ajp: Crosscheck the length of the body chunk with the length of
     the ajp message to prevent mod_proxy_ajp from reading beyond the buffer
     boundaries and thus revealing possibly sensitive memory contents to the
     client. [Ruediger Pluem]

  *) Ensure that the proper status line is written to the client, fixing
     incorrect status lines caused by filters which modify r->status without 
     resetting r->status_line, such as the built-in byterange filter.
     [Jeff Trawick]

  *) mod_speling: Stop crashing with certain non-file requests.  [Jeff Trawick]

  *) mod_cache: Make caching of reverse proxies possible again. PR 38017.
     [Ruediger Pluem]

  *) Modify apr[util] .h detection to avoid breakage on VPATH builds
     using Solaris make (amoung others) and avoid breakage in ./buildconf
     when srclib/apr[-util] are symlinks rather than directories proper.
     [William Rowe]

  *) Chunk filter: Fix chunk filter to create correct chunks in the case that
     a flush bucket is surrounded by data buckets. [Ruediger Pluem]

  *) Fix syntax error in httpd.h with strict compilers.  PR 38740.
     [Per Olausson <pao darkheim.freeserve.co.uk>]

  *) Preserve the Content-Length header for a proxied HEAD response.
     PR 18757.  [Greg Ames]

  *) Fix recursive ErrorDocument handling.  PR 36090.
     [Chris Darroch <chrisd pearsoncmg.com>]

  *) Don't hang on error return from post_read_request.  PR37790 [Nick Kew]

  *) Fix off-by-one error in proxy_balancer.  PR37753
     [Kazuhiro Osawa <ko yappo ne jp>]

Changes with Apache 2.2.0

  *) mod_negotiation: Minor performance tweak by reusing already calculated
     strlen.
     [Ruediger Pluem, Christophe Jaillet <christophe.jaillet wanadoo.fr>]

  *) Remove support for 'On' and 'Off' for AuthBasicProvider and
     AuthDigestProvider.  [Joshua Slive, Justin Erenkrantz]

  *) Add in new UseCanonicalPhysicalPort directive, which controls
     whether or not Apache will ever use the actual physical port
     when constructing the canonical port number. [Jim Jagielski]

  *) mod_dav: Fix a null pointer dereference in an error code path during the
     handling of MKCOL.
     [Ruediger Pluem, Ghassan Misherghi <ghassanm ucdavis.edu>]

  *) Fix DESTDIR=... installation when using bundled copy of APR.
     [Torsten Foertsch <torsten.foertsch gmx.net>]

  *) mod_proxy_balancer: When finding best worker, use case insensitive
     match for scheme and host, but case sensitive for the rest of
     the path. [Jim Jagielski, Ruediger Pluem]

Changes with Apache 2.1.9

  *) Add mod_authn_dbd (SQL-based  authentication) [Nick Kew]

  *) mod_proxy_ajp: Do not spool the entire response from AJP backend before
     sending it up the filter chain. PR37100.  [Ruediger Pluem]

  *) mod_cache: Create new filters CACHE_OUT_SUBREQ / CACHE_SAVE_SUBREQ which
     only differ by the type from CACHE_OUT / CACHE_SAVE to ensure that
     subrequests to non local resources work again. [Ruediger Pluem]

  *) mod_proxy: Do not lowercase the entire worker name of a BalancerMember
     since this breaks case sensitive URI's. PR36906.  [Ruediger Pluem]

  *) core: AddOutputFilterByType is ignored for proxied requests. PR31226.
     [Joe Orton, Ruediger Pluem]

  *) mod_proxy_http: Prevent data corruption of POST request bodies when
     client accesses proxied resources with SSL. PR37145.
     [Ruediger Pluem, William Rowe]

  *) mod_proxy_balancer: BalancerManager and proxies correctly handle
     member workers with paths. PR36816. [Ruediger Pluem, Jim Jagielski]

  *) mod_log_config: %{hextid}P will log the thread id in hex with APR
     versions 1.2.0 or higher.  [Jeff Trawick]

  *) httpd.exe/apachectl -V: display the DYNAMIC_MODULE_LIMIT setting, as
     in 1.3.  [Jeff Trawick]

  *) Support dbd connections tied to the conn_rec [Nick Kew]

  *) Move mod_dbd to /modules/database/ [Nick Kew]

  *) Move mod_filter and mod_charset_lite to /modules/filters/ [Nick Kew]

  *) Fix mod_dbd's config [Brian J. France <list firehawksystems.com>]

  *) mod_proxy_ajp: mod_proxy_ajp sends empty SSL attributes for non SSL
     connections. PR36883.
     [William Barker <william.barker wilshire.com>, Ruediger Pluem]

  *) Elimiated the NET_TIME filter, restructuring the timeout logic.
     This provides a working mod_echo on all platforms, and ensures any
     custom protocol module is at least given an initial timeout value
     based on the <VirtualHost > context's Timeout directive.
     [William Rowe]

  *) mod_proxy: Run the request_status hook also if there are no free workers
     or all workers are in error state.
     [Ruediger Pluem, Brian Akins <brian.akins turner.com>]

  *) mod_proxy_balancer: mod_proxy_balancer does not handle sticky sessions
     with tomcat correctly. PR36507. [Ruediger Pluem]

  *) mod_proxy_connect: Fix high CPU loop on systems like UnixWare which
     trigger POLL_ERR or POLL_HUP on a terminated connection.  PR 36951.
     [Jeff Trawick, Ruediger Pluem]

  *) SECURITY: CVE-2005-2970 (cve.mitre.org)
     worker MPM: Fix a memory leak which can occur after an aborted
     connection in some limited circumstances.  [Greg Ames]

  *) Doxygen fixup [Neale Ranns <neale ranns.org>, Ian Holsman]

  *) mod_cache/mod_dir: Correct a subrequest lookup bug which was preventing
     mod_dir from serving indexes correctly with mod_cache enabled. 
     [Colm MacCarthaigh]

Changes with Apache 2.1.8

  *) Fix lingering close implementation to match 1.3.x behaviour.
     PR 35292.  [Joe Orton]

  *) mod_ssl: Support limited buffering of request bodies to allow 
     per-location renegotiation to proceed.  PR 12355.  [Joe Orton]

  *) Fix regression since 2.0.x in AllowOverride Options handling. 
     PR 35330.  [kabe <kabe sra-tohoku.co.jp>]

  *) mod_ssl: Fix memory leak in ssl_util_algotypeof().
     PR 25659.  [David Blake <dblake hp com>, Martin Kraemer]

  *) prefork, worker and event MPMs: Support a graceful-stop procedure:
     Server will wait until existing requests are finished or until  
     "GracefulShutdownTimeout" number of seconds before exiting. 
     [Colm MacCarthaigh, Ken Coar, Bill Stoddard]

  *) prefork, worker and event MPMs: Prevent children from holding open 
     listening ports upon graceful restart or stop. PR 28167. 
     [Colm MacCarthaigh, Brian Pinkerton <bp thinkpink.com>]

  *) SECURITY: CVE-2005-2700 (cve.mitre.org)
     mod_ssl: Fix a security issue where "SSLVerifyClient" was not
     enforced in per-location context if "SSLVerifyClient optional"
     was configured in the vhost configuration.  [Joe Orton]

  *) mod_ssl: Catch parse errors from misconfigured or malformed
     CRLs.  PR 36438.  [Joe Orton]

  *) mod_proxy/mod_proxy_balancer: lbmethods now implemented as
     providers. Prevent problems when no Vhost containers were
     configured with proxy balancers. [Jim Jagielski]

  *) New provider function to list all available provider names in a
     specific group and version (ap_list_provider_names). [Jim Jagielski]

  *) mod_cache: Enhance CacheEnable/CacheDisable to control caching on a
     per-protocol, per-host and per-path basis. Intended for proxy
     configurations. [Colm MacCarthaigh]

  *) mod_disk_cache: Canonicalise the storage key, for improved hit/miss
     ratio. [Colm MacCarthaigh]

  *) mod_cgid: Append .PID to the script socket filename and remove the
     script socket on exit. [Colm MacCarthaigh, Jim Jagielski]

  *) mod_cgid: run the get_suexec_identity hook within the request-handler 
     instead of within cgid. PR 36410. [Colm MacCarthaigh]

  *) Linux 2.0: remove support for threaded MPM's due to linuxthreads use
     of SIGUSR1 clashing with graceful restart signal. [Colm MacCarthaigh]

Changes with Apache 2.1.7

  *) SECURITY: CVE-2005-2491 (cve.mitre.org): 
     Fix integer overflows in PCRE in quantifier parsing which could
     be triggered by a local user through use of a carefully-crafted 
     regex in an .htaccess file.  [Philip Hazel]

  *) mod_proxy/mod_proxy_balancer: Provide a simple, functional
     interface to add additional balancer lb selection methods
     without requiring code changes to mod_proxy/mod_proxy_balancer;
     these can be implemented via sub-modules now. [Jim Jagielski]

  *) mod_cache: Fix incorrectly served 304 responses when expired cache
     entity is valid, but cache is unwritable and headers cannot be
     updated.  [Colm MacCarthaigh <colm stdlib.net>]

  *) mod_cache: Remove entities from the cache when re-validation
     receives a 404 or other content-no-longer-present error.
     [Rüdiger Plüm ruediger.pluem vodafone.com]

  *) mod_disk_cache: Properly remove files from cache when needed.
     [Rüdiger Plüm ruediger.pluem vodafone.com]

  *) mod_disk_cache: Support htcacheclean removing directories.
     [Andreas Steinmetz]

  *) htcacheclean: Add -t option to remove empty directories.
     [Colm MacCarthaigh <colm stdlib.net>]

  *) Remove the base href tag from mod_proxy_ftp, as it breaks relative
     links for clients not using an Authorization header. [Graham Leggett,
     Jon Snow <jsnow27 gatesec.net>]

  *) mod_cache: Restore the HTTP status of cached responses.
     [Hansjoerg Pehofer <hansjoerg.pehofer uibk.ac.at>]

  *) mod_cache: Store varied contents all in the same prefix for a varied URI.
     [Paul Querna]

  *) mod_cache: Run the CACHE_SAVE and CACHE_OUT Filters after other content
     filters. [Paul Querna]

  *) mod_negotiation: Correctly report 404 instead of 403 for missing files.
     [Paul Querna]

  *) new hook (request_status) that gets ran in proxy_handler just before 
     the final return.  This gives modules an opportunity to do something 
     based on the proxy status. (minor MMN bump)
     [Brian Akins <bakins turner.com>, Ian Holsman]

  *) Add additional SSLSessionCache option, 'nonenotnull', which is
     similar to 'none' (disabling any external shared cache) but forces
     OpenSSL to provide a non-null session ID.  [Jim Jagielski]

  *) Add httxt2dbm to support/ for creating RewriteMap DBM Files.
     [Paul Querna]

  *) Add SSL_COMPRESS_METHOD variable (included in +StdEnvVars) to note
     the negotiated compression.  [Georg v. Zezschwitz <gvz 2scale.de>]

  *) Fixed complaints about unpackaged files within the RPM build
     after changes to the config files. [Graham Leggett]

  *) Fix shutdown for the Worker MPM when an Accept Filter is used. Instead of 
     just closing the socket, a HTTP request is made, to make sure the child is 
     always awakened. [Paul Querna]

Changes with Apache 2.1.6

  *) Fix htdbm password validation for records which included comments.
     [Eric Covener <covener gmail.com>]

  *) mod_cgid: Fix buffer overflow processing ScriptSock directive.
     [Steve Kemp <steve steve.org.uk>]

Changes with Apache 2.1.5

  *) mod_ssl: Setting the Protocol to 'https' can replace the use of the 
     'SSLEngine on' command. [Paul Querna]

  *) core: Refactor the mapping of Accept Filters to Sockets. Add the 
     AcceptFilter and Protocol directives to aid in mapping filter types.
     Extend the Listen directive to optionally take a protocol name.
     [Paul Querna]

  *) mod_disk_cache: Support storing multiple variations of one URL. PR 35211.
     [Paul Querna]

  *) mod_disk_cache: Atomically create the header data file. [Paul Querna]

  *) mod_cache: Fix 'Vary: *' behavior to be RFC compliant. PR 16125. 
     [Paul Querna]

  *) mod_cache: Rename 'generate_name' to 'ap_cache_generate_name'. 
     [Paul Querna]

  *) mod_mime_magic: Handle CRLF-format magic files so that it works with
     the default installation on Windows.  [Jeff Trawick]

  *) core: Allow multiple modules to register interest in a single 
     configuration command. [Paul Querna]

  *) authn_provider_alias: Adds the configuration block tag
     <AuthnProviderAlias baseProvider Alias>
     Authentication directives contained within this block can be
     referenced as a new authProvider using the AuthBasicProvider or
     AuthDigestProvider directive.  These directives will be merged in to
     the per_dir configuration just before the base provider is called.
     [Brad Nicholes]

  *) ap_getword_conf: Fix backslashes at the end of configuration directives. 
     PR 34834. [Timo Viipuri <viipuri dlc.fi>]

  *) mod_dbd: New additions: mod_dbd.c, mod_dbd.h, mod_dbd.xml
     Provide module hooks for apr_dbd; optimise for httpd
     threaded and non-threaded arch [Nick Kew]

  *) ab: SSL support rewritten, improved, and enabled if SSL is enabled
     during the build; -f and -Z arguments added to specify SSL protocol
     options.  [Masaoki Kobayashi <masaoki techfirm.co.jp>]

  *) mod_info: Show the Quick Handler [Paul Querna]

  *) mod_ldap: Add the directive LDAPVerifyServerCert to specify 
     whether to force verification of the server certificate when
     establishing an SSL connection to the LDAP server. 
     [Brad Nicholes]
     
  *) mod_proxy: Run mod_rewrite before mod_proxy in the translate_name
     hook. [Paul Querna]

  *) Add AP_INIT_TAKE_ARGV for configuration commands. (minor MMN bump) 
     [Paul Querna]

  *) ap_get_local_host() rewritten for APR. [Jim Jagielski]

  *) Add the ap_vhost_iterate_given_conn function to expose the information
     used in Name Based Virtual Hosting. (minor MMN bump)
     [Paul Querna]

  *) Remove the never working ap_method_list_do and ap_method_list_vdo.
     [Paul Querna]

  *) Added makefile and doc for building mod_ssl on the NetWare 
     platform. [Guenter Knauf, Brad Nicholes]
  
  *) mod_deflate: Merge the Vary header, isntead of Setting it. Fixes
     applications that send the Vary Header themselves, and also apply 
     mod_deflate as an output filter. [Paul Querna]

  *) Change the default (when not present in the config file) setting
     for UseCanonicalName to Off.
     [Joshua Slive]

  *) mod_userdir: The module no longer does any remapping unless the
     UserDir directive is present in the config file.
     [Joshua Slive]

  *) Massively simplify the distributed httpd.conf by removing
     many features and many directives that are at their default
     setting.  Add a selection of example config excerpts for adding
     extra features in the conf/extra/ directory.  Install the
     distributed config and the extra config examples in the
     conf/original/ directory during make install.
     [Joshua Slive, Justin Erenkrantz]

  *) NetWare: Reposition mod_asis, mod_actions, mod_cgi, mod_imagemap,
     mod_userdir and mod_autoindex as shared modules rather than 
     built-in modules within the NetWare build.
     [Brad Nicholes]

  *) Rename mod_imap to mod_imagemap.
     [Paul Querna]

  *) util_ldap: Eliminate the load ordering of mod_ldap and mod_authnz_ldap
     by changing the mod_ldap exported functions to optional functions.
     [Brad Nicholes]

Changes with Apache 2.1.4

  *) Don't let a subrequest inherit headers describing the original request's
     body.  [Greg Ames]

  *) Fix Windows CompContext buff size miscalculation
     [Allan Edwards]

  *) Add ReceiveBufferSize directive to control the TCP receive buffer.
     [Eric Covener <covener gmail.com>]

  *) mod_proxy: Add proxy-sendextracrlf option to send an extra CRLF at the
     end of the request body to work with really old HTTP servers.
     [Justin Erenkrantz]

  *) util_ldap: Keep track of the number of attributes retrieved from 
     LDAP so that all the values can be properly cached even if the 
     value is NULL. PR 33901 [Brad Nicholes]

  *) mod_cache: Fix error where incoming Cache-Control would be ignored.
     [Justin Erenkrantz]

  *) mod_cache: Correctly handle originally conditional requests.
     [Sander Striker]

  *) mod_disk_cache: Correctly update cached headers on revalidated responses.
     [Sander Striker, Justin Erenkrantz]

  *) worker MPM/mod_status: Support per-worker tracking of pid and
     generation in the scoreboard so that mod_status can accurately
     represent workers in processes which are gracefully terminating.
     (major MMN bump)
     [Jeff Trawick]

  *) Correctly export all mod_dav public functions.
     [Branko Čibej <brane xbc.nu>]

Changes with Apache 2.1.3

  *) mod_ssl: Add ssl_ext_lookup optional function for accessing
     certificate extensions.   [David Reid, Joe Orton]

  *) Add support for use of an external PCRE library; pass the
     --with-pcre flag to configure.  PR 27550.  [Joe Orton,
     Andres Salomon <dilinger voxel.net>]

  *) Renamed regex interfaces to be namespace-safe, and moved from
     pcreposix.h header to ap_regex.h: regex_t->ap_regex_t,
     regmatch_t->ap_regmatch_t; REG_*->AP_REG_*; functions
     reg*->ap_reg*.  PR 27550.  [Andres Salomon <dilinger voxel.net>,
     Joe Orton]

  *) Only recompile buildmark.c when we have to relink httpd.
     [Justin Erenkrantz]

  *) mod_cache: Fix up handling of revalidated responses.
     [Justin Erenkrantz]

  *) mod_disk_cache: Properly load cached ETag from on-disk structures.
     [Justin Erenkrantz]

  *) mod_authnz_ldap: Added an optional second parameter to AuthLDAPURL
     to allow it to override the connection type set in mod_ldap. This
     parameter can be set to NONE, SSL or TLS | STARTTLS.
     [Brad Nicholes]

  *) Fix --with-apr=/usr and/or --with-apr-util=/usr.  PR 29740.
     [Max Bowsher <maxb ukf.net>]

  *) mod_proxy: Fix ProxyRemoteMatch directive.  PR 33170.
     [Rici Lake <rici ricilake.net>]

  *) mod_proxy: Fix ap_proxy_canonenc API.
     PR 32459. [Jim Jagielski]

  *) mod_cache: Add CacheStorePrivate and CacheStoreNoStore directive.
     [Justin Erenkrantz]

  *) Add --enable-pie flag to configure, to build httpd as a Position
     Independent Executable where supported (GCC/binutils).
     [Joe Orton]

  *) proxy_balancer: Add in load-balancing via weighted traffic
     byte count. [Jim Jagielski]

  *) mod_disk_cache: Cache r->err_headers_out headers.  This allows CGI
     scripts to be properly cached.  [Justin Erenkrantz, Sander Striker]

  *) mod_ldap: Updated to use the new apr-util v1.1 apr_ldap_*_option()
     API for the setting of server and client SSL certificates. Replaced
     LDAPTrustedCA directive with LDAPTrustedGlobalCert and
     LDAPTrustedClientCert directives to correctly support global certs
     (CA certs / Netware client certs) and per connection client certs
     as supported by Netware, OpenLDAP and Netscape/Mozilla.
     [Graham Leggett]

  *) mod_cache: Remove unimplemented CacheForceCompletion directive.