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Changes with Apache 2.0.40
  *) mod_ext_filter: Add the ability to enable or disable a filter via
     an environment variable.  Add the ability to register a filter of
     type other than AP_FTYPE_RESOURCE.  [Jeff Trawick]

  *) Restore the ability to specify host names on Listen directives.
     PR 11030.  [Jeff Trawick, David Shane Holden <dpejesh@yahoo.com>]

  *) When deciding on the default address family for listening sockets, 
     make sure we can actually bind to an AF_INET6 socket before
     deciding that we should default to AF_INET6.  This fixes a startup
     problem on certain levels of OpenUNIX.  PR 10235.  [Jeff Trawick]

  *) Replace usage of atol() to parse strings when we might want a
     larger-than-long value with apr_atoll(), which returns long long.
     This allows HTTPD to deal with larger files correctly.
     [Shantonu Sen <ssen@apple.com>]

  *) mod_ext_filter: Ignore any content-type parameters when checking if
     the response should be filtered.  Previously, "intype=text/html"
     wouldn't match something like "text/html;charset=8859_1".
     [Jeff Trawick]

  *) mod_ext_filter: Set up environment variables for external programs.
     [Craig Sebenik <craig@netapp.com>]

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  *) Modified the HTTP_IN filter to immediately append the EOS (end of
     stream) bucket for C-L POST bodies, saving a roundtrip and allowing
     the caller to determine that no content remains without prefetching
     additional POST body.  [William Rowe]

  *) Get proxy ftp to work over IPv6.  [Shoichi Sakane <sakane@kame.net>]

  *) Look for OpenSSL libraries in /usr/lib64.  [Peter Poeml <poeml@suse.de>]

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  *) Update SuSE layout.  [Peter Poeml <poeml@suse.de>]

  *) Changes to the internationalized error documents:
     Comment them out in the default config file to make the default
     install as simple as possible; Correct the english 500 error to
     be more understandable; Add a Swedish translation.
     [Thomas Sjogren <thomas@northernsecurity.net>, 
      Erik Abele <erik@codefaktor.de>, Rich Bowen, Joshua Slive]
     
  *) Increase the limit on file descriptors per process in apachectl.
     [Brian Pane]

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  *) Fix a dependency error when building ApacheMonitor, so that Win32
     and MSVC now trust that the project is current (when it is).
     [James Cox <imajes@php.net>]

  *) mod_ext_filter: don't segfault if content-type is not set.  PR 10617.
     [Arthur P. Smith <apsmith@aps.org>, Jeff Trawick]

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  *) APR-Util Renames pending have been completed [Thom May]

  *) Performance improvements for the code that reads request
     headers (ap_rgetline_core() and related functions)  [Brian Pane]

  *) Add a new directive: MaxMemFree.  MaxMemFree makes it possible
     to configure the maximum amount of memory the allocators will
     hold on to for reuse.  Anything over the MaxMemFree threshold
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     will be free()d.  This directive is useful when uncommon large
     peaks occur in memory usage.  It should _not_ be used to mask
     defective modules' memory use.  [Sander Striker]
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  *) Fixed the Content-Length filter so that HTTP/1.0 requests to CGI
     scripts would not result in a truncated response.
     [Ryan Bloom, Justin Erenkrantz, Cliff Woolley]

  *) Add a filter_init parameter to the filter registration functions
     so that a filter can execute arbitrary code before the handlers
     are invoked.  This resolves a problem where mod_include requests
     would incorrectly return a 304.  [Justin Erenkrantz]

  *) Fix a long-standing bug in 2.0, CGI scripts were being called
     with relative paths instead of absolute paths.  Apache 1.3 used
     absolute paths for everything except for SuExec, this brings back
     that standard.  [Ryan Bloom]

  *) Fix infinite loop due to two HTTP_IN filters being present for
     internally redirected requests.  PR 10146.  [Justin Erenkrantz]

  *) Switch conn_rec->keepalive to an enumeration rather than a bitfield.
     [Justin Erenkrantz]

  *) Fix mod_ext_filter to look in the main server for filter definitions
     when running in a vhost if the filter definition is not found in
     the vhost.  PR 10147  [Jeff Trawick]

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  *) Support WinNT CGI invocation through ScriptInterpreterSource 
     'registry' for script interpreter paths and names with non-ascii
     characters in the executable filepath.  [William Rowe]

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  *) Support the -w flag on to keep the Win32 console open on error.
     [William Rowe]

  *) Normalize the hostname value in the request_rec to all-lowercase
     [Perry Harrington <pedward@webcom.com>]

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  *) Fix WinNT cgi 500 errors when QUERY_ARGS or other strings include
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     extended characters (non US-ASCII) in non-utf8 format.  This brings
     Win32 back into CGI/1.1 compliance, and leaves charset decoding up
     to the cgi application itself.  [William Rowe]

  *) Major overhaul of mod_dav, mod_dav_fs and the experimental/cache
     modules to bring them up to the current apr/apr-util APIs.
     [William Rowe]

  *) Fix segfault in mod_mem_cache most frequently observed when
     serving the same file to multiple clients on an MP machine.
     [Bill Stoddard]
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  *) mod_rewrite can now set cookies  (RewriteRule (.*) - [CO=name:$1:.domain])
     [Brian Degenhardt <bmd@mp3.com>, Ian Holsman]

  *) Fix perchild to work with apachectl by adding -k support to perchild.
     PR 10074  [Jeff Trawick]

  *) Fix a silly htpasswd.c logic error that incorrectly reported that
     both -c and -n had been used.  PR 9989  [Cliff Woolley]

  *) Fixed a mod_include error case in which no HTTP response was sent
     to the client if an shtml document contained an unterminated SSI
     directive [Brian Pane]

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  *) Improve ap_get_client_block implementation by using APR-util brigade
     helper functions and relying on current filter assumptions.
     [Justin Erenkrantz]

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Changes with Apache 2.0.39

  *) Fixed a build problem in htpasswd.c on Win32.
     [Guenter Knauf <eflash@gmx.net>, Cliff Woolley]
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Changes with Apache 2.0.38

  *) Rewrite htpasswd to use APR.  The removes the annoying warning about
     tmpnam being unsafe.   [Ryan Bloom]

  *) We must set the MIME-type for .shtml files to text/html if we want them
     to be parsed for SSI tags.  Add the config for that to the default 
     config file so that it is easier to enable .shtml parsing.
     [Dave Dyer <ddyer@real-me.net>]

  *) Fixed a problem with 'make install' on ReliantUnix.
     [Jean-frederic Clere <jfrederic.clere@fujitsu-siemens.com>]

  *) Make the default_handler catch all requests that aren't served by
     another handler.  This also gets us to return a 404 if a directory
     is requested, there is no DirectoryIndex, and mod_autoindex isn't
     loaded.  [Justin Erenkrantz]

  *) Fixed the handling of nested if-statements in shtml files.
     PR 9866  [Brian Pane]

  *) Allow 'make install DESTDIR=/path'.  This allows packagers to install
     into a directory different from the one that was configured.  This 
     also mirrors the root= feature from 1.3.  We cannot use prefix=,
     because both APR and APR-util resolve their installation paths at 
     configuration time.  This means that there is no variable prefix 
     to replace.  [Andreas Hasenack <andreas@netbank.com.br>]

  *) AIX 4.3.2 and above: Define SINGLE_LISTEN_UNSERIALIZED_ACCEPT.
     These levels of AIX don't have a thundering herd problem with
     accept().  [Jeff Trawick]

  *) prefork MPM: Ignore mutex errors during graceful restart.  For
     certain types of mutexes (particularly SysV semaphores), we
     should expect to occasionally fail to obtain or release the
     mutex during restart processing.  [Jeff Trawick]

  *) Fix install-bindist.sh so that it finds any perl instead of just
     early perl 5.x versions.  This is consistent with a build/install
     from source, and it allows the perl scripts installed by a bindist 
     to work on systems with perl 5.6.  [Jeff Trawick]

  *) Fix apxs so that the makefile created by "apxs -g" works on AIX and
     Tru64 (and probably some other platforms).  [Jeff Trawick]

  *) Allow CGI scripts to return their Content-Length.  This also fixes a
     hang on HEAD requests seen on certain platforms (such as FreeBSD).
     [Justin Erenkrantz]

  *) Added log rotation based on file size to the RotateLog support
     utility. [Brad Nicholes]

  *) Fix some casting in mod_rewrite which broke random maps.
     PR 9770  [Allan Edwards, Greg Ames, Jeff Trawick]
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Changes with Apache 2.0.37

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  *) allow POST method over SSL when per-directory client cert
     authentication is used with 'SSLOptions +OptRenegotiate' enabled
     and a client cert was found in the ssl session cache.

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  *) 'SSLOptions +OptRengotiate' will use client cert in from the ssl
     session cache when there is no cert chain in the cache.  prior to
     the fix this situation would result in a FORBIDDEN response and
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