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  [Remove entries to the current 2.0 and 2.2 section below, when backported]
  *) 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_proxy_ajp: Do not spool the entire response from AJP backend before
     sending it up the filter chain. PR37100.  [Ruediger Pluem]

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

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  *) New module: mod_authn_dbd [Nick Kew]

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

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  *) 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]

  *) 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]

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  *) 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]

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  *) 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)
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     worker MPM: Fix a memory leak which can occur after an aborted
     connection in some limited circumstances.  [Greg Ames]
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  *) 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]

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Changes with Apache 2.1.8

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  *) 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]
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  *) 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]
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  *) 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]

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  *) 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)
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     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]

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

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

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

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

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  *) 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
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  *) 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]

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  *) 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]
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