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Changes with Apache 2.0.41
  *) Win32: Lower the default stack size from 1MB to 256K. This will
     allow around 8000 threads to be started per child process. 
     'EDITBIN /STACK:size apache.exe' can be used to change this 
     value directly in the apache.exe executable.
     [Bill Stoddard]

  *) Win32: Implement ThreadLimit directive in the Windows MPM.
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  *) Remove CacheOn config directive since it is set but never checked.
     No sense wasting cycles on unused code. Besides, the only truly
     bug free code is deleted code. :)   [Paul J. Reder]

  *) BufferLogs are now run-time enabled, and the log_config now has 2 new
     callbacks to allow a 3rd party module to actually do the writing of the
     log file [Ian Holsman]

  *) Correct ISAPIReadAheadBuffer to default to 49152, per mod_isapi docs.
     [André Malo, Astrid Keßler <kess@kess-net.de>]

  *) Fix Segfault in mod_cache. [Kris Verbeeck <Kris.Verbeeck@ubizen.com>]

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  *) Fix a null pointer dereference in the merge_env_dir_configs
     function of the mod_env module. PR 11791
     [Paul J. Reder]

  *) New option to ServerTokens 'maj[or]'. Only show the major version
     Also Surfaced this directive in the standard config (default FULL)
     [Ian Holsman]

  *) Change mod_rewrite to use apr-util's dbm support for dbm rewrite
     maps.  The dbm type (e.g., ndbm, gdbm) can be specified on the
     RewriteMap directive.  PR 10644  [Jeff Trawick]
  *) Fixed mod_rewrite's RewriteMap prg: support so that request/response
     pairs will no longer get out of sync with each other.  PR 9534
     [Cliff Woolley]

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  *) Fixes required to get quoted and escaped command args working in
     mod_ext_filter. PR 11793 [Paul J. Reder]

  *) mod-proxy: handle proxied responses with no status lines
     [JD Silvester <jsilves@uwo.ca>, Brett Huttley <brett@huttley.net>]
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  *) Fix bug where environment or command line arguments containing 
     non-ASCII-7 characters would cause the Win32 child process creation
     to fail.  PR 11854  [William Rowe]

  *) Bug #11213.. make module loading error messages more informative 
     [Ian Darwin <Ian779@darwinsys.com>]

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  *) thread safety & proxy-ftp [Alexey Panchenko alexey@liwest.ru, Ian Holsman]

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  *) mod_disk_cache works much better. This module should still
     be considered experimental. [Eric Prud'hommeaux]
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  *) Performance improvement for keepalive requests: when setting
     aside a small file for potential concatenation with the next
     response on the connection, set aside the file descriptor rather
     than copying the file into the heap.  [Brian Pane]
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Changes with Apache 2.0.40
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  *) SECURITY: [CAN-2002-0661] Close a very significant security hole that 
     applies only to the Win32, OS2 and Netware platforms.  Unix was not 
     affected, Cygwin may be affected.  Certain URIs will bypass security
     and allow users to invoke or access any file depending on the system 
     configuration.  Without upgrading, a single .conf change will close 
     the vulnerability.  Add the following directive in the global server
     httpd.conf context before any other Alias or Redirect directives;
         RedirectMatch 400 "\\\.\."
     Reported by Auriemma Luigi <bugtest@sitoverde.com>.
     [Brad Nicholes]

  *) SECURITY:  Close a path-revealing exposure in multiview type
     map negotiation (such as the default error documents) where the
     module would report the full path of the typemapped .var file when
     multiple documents or no documents could be served based on the mime
     negotiation.  Reported by Auriemma Luigi <bugtest@sitoverde.com>.
     [CAN-2002-0654]  [William Rowe]

  *) SECURITY:  Close a path-revealing exposure in cgi/cgid when we 
     fail to invoke a script.  The modules would report "couldn't create 
     child process /path-to-script/script.pl" revealing the full path
     of the script.  Reported by Jim Race <jrace@qualys.com>.
     [CAN-2002-0654]  [Bill Stoddard]

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  *) Set aside the apr-iconv and apr_xlate() features for the Win32
     build of 2.0.40 so development can be completed.  A patch, from
     <http://www.apache.org/dist/httpd/patches/apply_to_2.0.40/>
     will be available for those that wish to work with apr-iconv.
     [William Rowe]

  *) Fix proxy so that it is possible to access ftp: URLs via a proxy
     chain. [Peter Van Biesen <peter.vanbiesen@vlafo.be>]

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  *) mod-deflate now checks to make sure that 'gzip-only-text/html' is
     set to 1, so we can exclude things from the general case with
     browsermatch. [Ian Holsman, Andre Schild <A.Schild@aarboard.ch>]
  
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  *) Accept multiple leading /'s for requests within the DocumentRoot.
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     PR 10946  [William Rowe, David Shane Holden <dpejesh@yahoo.com>]
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  *) Solved the reports of .pdf byterange failures on Win32 alone.
     APR's sendfile for the win32 platform collapses header and trailer
     buffers into a single buffer.  However, we destroyed the pointers
     to the header buffer if a trailer buffer was present.  PR 10781
     [William Rowe]

  *) 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 
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