Fix potential proxy segfault

[apache] / CHANGES

                                                        -*- coding: utf-8 -*-
Changes with Apache 2.3.0

  *) mod_proxy_connect: avoid segfault on DNS lookup failure.
     PR 40756 [Trevin Beattie <tbeattie boingo.com>]

  *) mod_proxy: enable Ignore Errors option on ProxyPass Status.
     PR 43167 [Francisco Gimeno <kikov kikov.org>

  *) mod_proxy_http: Don't try to read body of a HEAD request before
     responding.
     PR 41644 [Stuart Children <stuart terminus.co.uk>]

  *) mod_autoindex: Add in Type and Charset options to
     IndexOptions directive. This allows the admin to explicitly
     set the content-type and charset of the generated page.
     [Jim Jagielski]

  *) mime.types: Many updates to sync with IANA registry and common
     unregistered types that the owners refuse to register.  Admins
     are encouraged to update their installed mime.types file.
     PR: 35550, 37798, 39317, 31483 [Roy T. Fielding]

  *) log core: ensure we use a special pool for stderr logging, so that
     the stderr channel remains valid from the time plog is destroyed,
     until the time the open_logs hook is called again.  [William Rowe]

  *) main core: Emit errors during the initial apr_app_initialize()
     or apr_pool_create() (when apr-based error reporting is not ready).
     [William Rowe, Jeff Trawick]

  *) mpm_winnt: Prevent the parent-child pipe from leaking into other
     spawned processes, and ensure we have a /Device/null handle for
     stdout when running as-a-service.  [William Rowe]

  *) log core: fix the new piped logger case where we couldn't connect 
     the replacement stderr logger's stderr to the NULL stdout stream.  
     Continue in this case, since the previous alternative of no error 
     logging at all (/dev/null) is far worse. [William Rowe]

  *) mod_ldap: Avoid possible crashes, hangs, and busy loops due to
     improper merging of the cache lock in vhost config
     PR 43164 [Eric Covener]

  *) mod_negotiation: preserve Query String in resolving a type map
     PR 33112 [Jørgen Thomsen <apache jth.net>, Nick Kew]

  *) mod_deflate: fix content_encoding detection in inflate_out filter
     when it's not in response headers table.
     PR 42993 [Nick Kew]

  *) mod_proxy: Improve network performance by setting APR_TCP_NODELAY
     (disable Nagle algorithm) on sockets if implemented.
     PR 42871 [Christian BOITEL <christian_boitel yahoo.fr>, Jim Jagielski]

  *) mod_info: mod_info outputs invalid XHTML 1.0 transitional.
     PR 42847 [Rici Lake <rici ricilake.net>]

  *) mime.types: add registered Apple installer type
     PR 40379 [Peter Bierman <pmb+apache apple.com>]
   
  *) mod_ldap, mod_authnzldap: Add support for nested groups (i.e. the ability
     to authorize an authenticated user via a "require ldap-group X" directive
     where the user is not in group X, but is in a subgroup contained in X.
     PR 42891 [Paul J. Reder]

  *) mod_deflate: don't try to process metadata buckets as data.  what should
     have been a 413 error was logged as a 500 and a blank screen appeared
     at the browser.
     [Greg Ames, Ruediger Pluem]

  *) SECURITY: CVE-2007-3304 (cve.mitre.org)
     prefork, worker, event MPMs: Ensure that the parent process cannot
     be forced to kill processes outside its process group.  [Joe Orton]

  *) SECURITY: CVE-2006-5752 (cve.mitre.org)
     mod_status: Fix a possible XSS attack against a site with a public
     server-status page and ExtendedStatus enabled, for browsers which
     perform charset "detection".  Reported by Stefan Esser.  [Joe Orton]

  *) Event MPM: Add support for running under mod_ssl, by reverting to the
     Worker MPM behaviors, when run under an input filter that buffers
     its own data. [Paul Querna]

  *) mod_ssl: Add support for caching SSL Sessions in memcached. [Paul Querna]

  *) SECURITY: CVE-2007-1862 (cve.mitre.org)
     mod_mem_cache: Copy headers into longer lived storage; header names and 
     values could previously point to cleaned up storage
     PR 41551 [Davi Arnaut <davi haxent.com.br>]

  *) mod_cache: Do not set Date or Expires when they are missing from
     the original response or are invalid.  [Justin Erenkrantz]

  *) mod_cache: Correctly handle HEAD requests on expired cache content.
     PR 41230.  [Niklas Edmundsson]

  *) mod_proxy: Added ProxyPassMatch directive, which is similar
     to ProxyPass but takes a regex local path prefix. [Jim Jagielski]

  *) mod_so: Solve dev's confusion by reporting expected/seen module
     magic signatures when failing with a 'garbled' message, and solve
     user's confusion by pointing out 'perhaps compiled for a different
     version of apache?'.  [William Rowe]

  *) mod_substitute: Added a new experimental output filter, which
     performs inline response content pattern matching (including
     regex) and substitution.  [Jim Jagielski]

  *) mod_ssl: Version reporting update; displays 'compiled against'
     Apache and build-time SSL Library versions at loglevel [info],
     while reporting the run-time SSL Library version in the server
     info tags.  Helps to identify a mod_ssl built against one flavor
     of OpenSSL but running against another (also adds SSL-C version
     number reporting.)  [William Rowe]

  *) core: Change etag generation to produce identical results on 
     32-bit and 64-bit platforms.  PR 40064.  [Joe Orton]

  *) ab: Add -r option to continue after socket receive errors. 
     [Filip Hanik <devlist hanik.com>]

  *) mod_ldap: Fix the search limit parameter to ldap_search_ext_s()
     for SDKs that define LDAP_NO_LIMIT to something other than -1.
     [David Jones <oscaremma gmail.com>]

  *) mod_dbd: Introduce configuration groups to allow inheritance by virtual
     hosts of database configurations from the main server.  Determine the
     minimal set of distinct configurations and share connection pools
     whenever possible.  Allow virtual hosts to override inherited SQL
     statements.  PR 41302.  [Chris Darroch]

  *) core: Fix broken chunk filtering that causes all non blocking reads to be
     converted into blocking reads.  PR 41056. [Jean-Frederic Clere, Jim Jagielski]

  *) apxs: Enhance -q flag to print all known variables and their values
     when invoked without variable name(s). 
     [William Rowe, Sander Temme]

  *) mod_dbd: Create memory sub-pools for each DB connection and close
     DB connections in a pool cleanup function.  Ensure prepared statements
     are destroyed before DB connection is closed.  When using reslists,
     prevent segfaults when child processes exit, and stop memory leakage
     of ap_dbd_t structures.  Avoid use of global s->process->pool, which
     isn't destroyed by exiting child processes in most multi-process MPMs.
     PR 39985.  [Chris Darroch, Nick Kew]

  *) apxs: Eliminate run-time check for mod_so.  PR 40653.
     [David M. Lee <dmlee crossroads.com>]

  *) beos MPM: Create pmain pool and run modules' child_init hooks when
     entering ap_mpm_run(), then destroy pmain when exiting ap_mpm_run().
     [Chris Darroch]

  *) 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]

  *) 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_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>]

  *) 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 deprecated. 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]

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

  *) 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]

  *) 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: Move the directives 'Order', 'Allow', 'Deny' and 'Satisfy' 
     into the new module mod_access_compat which can be loaded to provide 
     support 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 2.2.5

  *) ApacheMonitor: Fix Windows Vista detection. [Mladen Turk]

  *) mod_deflate: fix protocol handling in deflate input filter
     PR 23287 [Nick Kew]

  *) mod_proxy: fix buffer overflow issue
     PR 41144 [Davi Arnaut]

  *) mime.types: add Registered Javascript/ECMAScript MIME types (RFC4329)
     PR 40299 [Dave Hodder <dmh dmh.org.uk>]

  *) mod_filter: fix integer comparisons in dispatch rules
     PR 41835 [Nick Kew]

  *) mod_filter: fix merging of ! and = in FilterChain
     PR 42186 [Issac Goldstand <margol beamartyr.net>]
 
  *) mod_cache: Let Cache-Control max-age set the expiration of the cached
     representation if Expires is not set.  [Justin Erenkrantz]

  *) mod_disk_cache: Allow Vary'd responses to be refreshed properly.
     [Justin Erenkrantz]

  *) mod_cache: Allow caching of requests with query arguments when
     Cache-Control max-age is explicitly specified.  [Justin Erenkrantz]

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

  *) mod_so: Provide more helpful LoadModule feedback when an error occurs.
     [William Rowe]

  *) mod_alias: Accept path components (URL part) in Redirects.  PR 35314.
     [Nick Kew]

  *) mod_headers: Allow % at the end of a Header value.  PR 36609.
     [Nick Kew, Ruediger Pluem]

  *) mod_cache: Use the same cache key throughout the whole request processing
     to handle escaped URLs correctly.  PR 41475. [Ruediger Pluem]

  *) mod_cache: Add CacheIgnoreQueryString directive.  PR 41484.
     [Fredrik Widlund <fredrik.widlund qbrick.com>]

  *) 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]

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

  *) mod_proxy_http: Change handling of ProxyErrorOverride such that
     3xx responses are no longer over-ridden (handling of 4xx and 5xx
     responses is unchanged).  PR 39245.
     [Jeff Trawick, Bart van der Schans <schans hippo.nl>]

  *) htdbm: Enable crypt support on platforms with crypt() but not
     <crypt.h>, such as z/OS. [David Jones <oscaremma gmail.com>]

  *) mod_ssl: initialize thread locks before initializing the hardware
     acceleration library, so the latter can make use of the former. 
     PR 20951. [adunn at ncipher.com]

  *) ab.c: Correct behavior of HTTP request headers sent by ab
     in presence of -H command-line overrides. PR 31268, 26554.
     [Arvind Srinivasan <arvind.srinivasan  sun.com>]

  *) ab.c: The apr_port_t type is unsigned, but ab was using a
     signed format code in its reports. PR 42070.
     [Takashi Sato <serai  lans-tv.com>]

  *) core: Correct a regression since 2.0.x in the handling of AllowOverride 
     Options.  PR 41829.  [Torsten Förtsch <torsten.foertsch gmx.net>]

  *) 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>]

  *) mod_proxy: Fix some proxy setting inheritance problems (eg:
     ProxyTimeout). PR 11540. [Stuart Children <stuart terminus.co.uk>]

  *) Unix MPMs: Catch SIGFPE so that exception hooks and CoreDumpDirectory
     can work after that terminating signal.
     [Eric Covener <covener gmail.com>]

  *) Win32: Makefile.win will now build with MS VC 8 (Visual Studio 2005)
     including embedding the .manifest information into each binary.
     [William Rowe]

Changes with Apache 2.2.4

  *) mod_isapi: Correctly present SERVER_PORT_SECURE.
     PR: 40573.  [Matt Eaton <asf divinehawk.com>]

  *) 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.  Log these as well.
     PR 30022, 40470.  [William Rowe, Matt Eaton <asf divinehawk.com>]

  *) 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]


  [Apache 2.1.0-dev includes those bug fixes and changes with the
   Apache 2.2.xx tree as documented, and except as noted, below.]

Changes with Apache 2.2.x and later:

  *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.2.x/CHANGES?view=markup

Changes with Apache 2.0.x and later:

  *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.0.x/CHANGES?view=markup

Changes with Apache 1.3.x and later:

  *) http://svn.apache.org/viewvc/httpd/httpd/branches/1.3.x/src/CHANGES?view=markup