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Changes with Apache 2.0.49
  *) mod_log_config: Fix corruption of buffered logs with threaded
     MPMs.  PR 25520.  [Jeff Trawick]

  *) Fix mod_include's expression parser to recognize strings correctly
     even if they start with an escaped token.  [André Malo]

  *) Add fatal exception hook for use by diagnostic modules.  The hook
     is only available if the --enable-exception-hook configure parm 
     is used and the EnableExceptionHook directive has been set to 
     "on".  [Jeff Trawick]

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  *) Allow mod_auth_digest to work with sub-requests with different
     methods than the original request.  PR 25040.
     [Josh Dady <jpd indecisive.com>]

  *) fix "Expected </Foo>> but saw </Foo>" errors in nested,
     argumentless containers.
     ["Philippe M. Chiasson" <gozer cpan.org>]

  *) mod_auth_ldap: Fix some segfaults in the cache logic.  PR 18756.
     [Matthieu Estrade <apache moresecurity.org>, Brad Nicholes]

  *) mod_cgid: Restart the cgid daemon if it crashes.  PR 19849
     [Glenn Nielsen <glenn apache.org>]

  *) The whole codebase was relicensed and is now available under
     the Apache License, Version 2.0 (http://www.apache.org/licenses).
     [Apache Software Foundation]

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  *) Fixed cache-removal order in mod_mem_cache.
     [Jean-Jacques Clar, Cliff Woolley]

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  *) mod_setenvif: Fix the regex optimizer, which under circumstances
     treated the supplied regex as literal string. PR 24219.
     [André Malo]

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  *) ap_mpm.h: Fix include guard of ap_mpm.h to reference mpm
     instead of mmn. [André Malo]

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  *) mod_rewrite: Catch an edge case, where strange subsequent RewriteRules
     could lead to a 400 (Bad Request) response.  [André Malo]

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  *) Keep focus of ITERATE and ITERATE2 on the current module when
     the module chooses to return DECLINE_CMD for the directive.
     PR 22299.  [Geoffrey Young <geoff apache.org>]

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  *) Add support for IMT minor-type wildcards (e.g., text/*) to
     ExpiresByType.  PR#7991  [Ken Coar]

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  *) Fix segfault in mod_mem_cache cache_insert() due to cache size
     becoming negative.  PR: 21285, 21287
     [Bill Stoddard, Massimo Torquati, Jean-Jacques Clar]

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  *) core.c: If large file support is enabled, allow any file that is
     greater than AP_MAX_SENDFILE to be split into multiple buckets.
     This allows Apache to send files that are greater than 2gig.
     Otherwise we run into 32/64 bit type mismatches in the file size.
     [Brad Nicholes]

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  *) proxy_http fix: mod_proxy hangs when both KeepAlive and
     ProxyErrorOverride are enabled, and a non-200 response without a
     body is generated by the backend server. (e.g.: a client makes a
     request containing the "If-Modified-Since" and "If-None-Match"
     headers, to which the backend server respond with status 304.)
     [Graham Wiseman <gwiseman fscinternet.com>, Richard Reiner]

  *) mod_dav: Reject requests which include an unescaped fragment in the
     Request-URI.  PR 21779.  [Amit Athavale <amit_athavale lycos.com>]

  *) Build array of allowed methods with proper dimensions, fixing
     possible memory corruption.  [Jeff Trawick]

  *) mod_ssl: Fix potential segfault on lookup of SSL_SESSION_ID.
     PR 15057.  [Otmar Lendl <lendl nic.at>]

  *) mod_ssl: Fix streaming output from an nph- CGI script. PR 21944
     [Joe Orton]

  *) mod_usertrack no longer inspects the Cookie2 header for
     the cookie name. PR 11475.  [Chris Darrochi <chrisd pearsoncmg.com>]

  *) mod_usertrack no longer overwrites other cookies.
     PR 26002.  [Scott Moore <apache nopdesign.com>]

  *) worker MPM: fix stack overlay bug that could cause the parent
     process to crash.  [Jeff Trawick]

  *) Win32: Add Win32DisableAcceptEx directive. This Windows
     NT/2000/CP directive is useful to work around bugs in some 
     third party layered service providers like virus scanners, 
     VPN and firewall products, that do not properly handle 
     WinSock 2 APIs.  Use this directive if your server is issuing
     AcceptEx failed messages.
     [Allan Edwards, Bill Rowe, Bill Stoddard, Jeff Trawick]
  *) Make REMOTE_PORT variable available in mod_rewrite.
     PR 25772.  [André Malo]

  *) Fix a long delay with CGI requests and keepalive connections on
     AIX.  [Jeff Trawick]

  *) mod_autoindex: Add 'XHTML' option in order to allow switching between
     HTML 3.2 and XHTML 1.0 output. PR 23747.  [André Malo]

  *) Add XHTML Document Type Definitions to httpd.h (minor MMN bump).
     [André Malo]

  *) mod_ssl: Advertise SSL library version as determined at run-time rather
     than at compile-time.  PR 23956.  [Eric Seidel <seidel apple.com>]

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  *) mod_ssl: Fix segfault on a non-SSL request if the 'c' log
     format code is used.  PR 22741.  [Gary E. Miller <gem rellim.com>]

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  *) Fix build with parallel make.  PR 24643.  [Joe Orton]

  *) mod_rewrite: In external rewrite maps lookup keys containing
     a newline now cause a lookup failure. PR 14453.
     [Cedric Gavage <cedric.gavage unixtech.be>, André Malo]

  *) Backport major overhaul of mod_include's filter parser from 2.1.
     The new parser code is expected to be more robust and should
     catch all of the edge cases that were not handled by the previous one.
     The 2.1 external API changes were hidden by a wrapper which is
     expected to keep the API backwards compatible.  [André Malo]

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  *) Add a hook (insert_error_filter) to allow filters to re-insert
     themselves during processing of error responses. Enable mod_expires
     to use the new hook to include Expires headers in valid error
     responses. This addresses an RFC violation. It fixes PRs 19794,
     24884, and 25123. [Paul J. Reder]

  *) Add Polish translation of error messages.  PR 25101.
     [Tomasz Kepczynski <tomek jot23.org>]

  *) Add AP_MPMQ_MPM_STATE function code for ap_mpm_query. (Not yet
     supported for BeOS or OS/2 MPMs.)  [Jeff Trawick, Brad Nicholes,
     Bill Stoddard]
  *) Add mod_status hook to allow modules to add to the mod_status
     report.  [Joe Orton]

  *) Fix htdbm to generate comment fields in DBM files correctly.
     [Justin Erenkrantz]

  *) mod_dav: Use bucket brigades when reading PUT data. This avoids
     problems if the data stream is modified by an input filter. PR 22104.
     [Tim Robbins <tim robbins.dropbear.id.au>, André Malo]

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  *) Fix RewriteBase directive to not add double slashes.  [André Malo]

  *) Improve 'configure --help' output for some modules.  [Astrid Keßler]

  *) Correct UseCanonicalName Off to properly check incoming port number.
     [Jim Jagielski]

  *) Fix slow graceful restarts with prefork MPM.  [Joe Orton]

  *) Fix a problem with namespace mappings being dropped in mod_dav_fs;
     if any property values were set which defined namespaces these
     came out mangled in the PROPFIND response.  PR 11637.
     [Amit Athavale <amit_athavale persistent.co.in>]

  *) mod_dav: Return a WWW-auth header for MOVE/COPY requests where
     the destination resource gives a 401.  PR 15571.  [Joe Orton]

  *) SECURITY: CAN-2003-0020 (cve.mitre.org)
     Escape arbitrary data before writing into the errorlog. Unescaped
     errorlogs are still possible using the compile time switch
     "-DAP_UNSAFE_ERROR_LOG_UNESCAPED".  [Geoffrey Young, André Malo]
  *) mod_autoindex / core: Don't fail to show filenames containing
     special characters like '%'. PR 13598.  [André Malo]
 
  *) mod_status: Report total CPU time accurately when using a threaded
     MPM.  PR 23795.  [Jeff Trawick]

  *) Fix memory leak in handling of request bodies during reverse
     proxy operations.  PR 24991. [Larry Toppi <larry.toppi citrix.com>]

  *) Win32 MPM: Implement MaxMemFree to enable setting an upper
     limit on the amount of storage used by the bucket brigades
     in each server thread. [Bill Stoddard]
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  *) Modified the cache code to be header-location agnostic. Also
     fixed a number of other cache code bugs related to PR 15852.
     Includes a patch submitted by Sushma Rai <rsushma novell.com>.
     This fixes mod_mem_cache but not mod_disk_cache yet so I'm not
     closing the PR since that is what they are using. [Paul J. Reder]

  *) complain via error_log when mod_include's INCLUDES filter is
     enabled, but the relevant Options flag allowing the filter to run
     for the specific resource wasn't set, so that the filter won't
     silently get skipped. next remove itself, so the warning will be
     logged only once [Stas Bekman, Jeff Trawick, Bill Rowe]

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  *) mod_info: HTML escape configuration information so it displays 
     correctly. PR 24232. [Thom May]
     
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