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Changes with Apache 2.3.15

  *) mod_ssl, configure: require OpenSSL 0.9.7 or later. [Kaspar Brand]

  *) mod_ssl: remove ssl_toolkit_compat layer. [Kaspar Brand]

  *) mod_ssl, configure, ab: drop support for RSA BSAFE SSL-C toolkit.
     [Kaspar Brand]

  *) mod_usertrack: Run mod_usertrack earlier in the fixups hook to ensure the 
     cookie is set when modules such as mod_rewrite trigger a redirect. Also
     use r->err_headers_out for the cookie, for the same reason.  PR29755.
     [Sami J. Mäkinen <sjm almamedia fi>, Eric Covener]

  *) mod_proxy_http, mod_proxy_connect: Add 'proxy-status' and
     'proxy-source-port' request notes for logging. PR 30195. [Stefan Fritsch]

  *) configure: Enable ldap modules in 'all' and 'most' selections if ldap
     is compiled into apr-util. [Stefan Fritsch]

  *) core: Add ap_check_cmd_context()-check if a command is executed in
     .htaccess file. [Stefan Fritsch]

  *) mod_deflate: Fix endless loop if first bucket is metadata. PR 51590.
     [Torsten Foertsch <torsten foertsch gmx net>]
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Changes with Apache 2.3.14

  *) mod_proxy_ajp: Improve trace logging.  [Rainer Jung]

  *) mod_proxy_ajp: Respect "reuse" flag in END_REPONSE packets.
     [Rainer Jung]

  *) mod_proxy: enable absolute URLs to be rewritten with ProxyPassReverse,
     e.g. to reverse proxy "Location: https://other-internal-server/login"
     [Nick Kew]

  *) prefork, worker, event: Make sure crashes are logged to the error log if
     httpd has already detached from the console. [Stefan Fritsch]

  *) prefork, worker, event: Reduce period during startup/restart where a
     successive signal may be lost. PR 43696. [Arun Bhalla <arun shme net>]

  *) mod_allowmethods: Correct Merging of "reset" and do not allow an
     empty parameter list for the AllowMethods directive. [Rainer Jung]

  *) configure: Update selection of modules for 'all' and 'most'. 'all' will
     now enable all modules except for example and test modules. Make the
     selection for 'most' more useful (including ssl and proxy). Both 'all'
     and 'most' will now disable modules if dependencies are missing instead
     of aborting. If a specific module is requested with --enable-XXX=yes,
     missing dependencies will still cause configure to exit with an error.
     [Stefan Fritsch]

  *) mod_ldap: Revert the integration of apr-ldap as ap_ldap which was done
     in 2.3.13. [Stefan Fritsch]

  *) core: For '*' or '_default_' vhosts, use a wildcard address of any 
     address family, rather than IPv4 only.  [Joe Orton]

  *) core, mod_rewrite, mod_ssl, mod_nw_ssl: Make the SERVER_NAME variable
     include [ ] for literal IPv6 addresses, as mandated by RFC 3875.
     PR 26005. [Stefan Fritsch]

  *) mod_negotiation: Fix parsing of Content-Length in type maps. PR 42203.
     [Nagae Hidetake <nagae eagan jp>]

  *) core: Add more logging to ap_scan_script_header_err* functions. Add
     ap_scan_script_header_err*_ex functions that take a module index for
     logging.
     mod_cgi, mod_cgid, mod_proxy_fcgi, mod_proxy_scgi, mod_isapi: Use the
     new functions in order to make logging configurable per-module.
     [Stefan Fritsch]

  *) mod_dir: Add DirectoryIndexRedirect to send an external redirect to
     the proper index.  [Eric Covener]

  *) mod_deflate: Don't try to compress requests with a zero sized body.
     PR 51350. [Stefan Fritsch]

  *) core: Fix startup on IP6-only systems. PR 50592. [Joe Orton,
     <root linkage white-void net>]

  *) suexec: Add environment variables CONTEXT_DOCUMENT_ROOT, CONTEXT_PREFIX,
     REDIRECT_ERROR_NOTES, REDIRECT_SCRIPT_FILENAME, REQUEST_SCHEME to the
     whitelist in suexec. PR 51499. [Graham Laverty <graham reg ca>,
     Stefan Fritsch]

  *) mod_rewrite: Fix regexp RewriteCond with NoCase. [Stefan Fritsch]

  *) mod_log_debug: New module that allows to log custom messages at various
     phases in the request processing. [Stefan Fritsch]

  *) mod_ssl: Add some debug logging when loading server certificates.
     PR 37912. [Nick Burch <nick burch alfresco com>]
  *) configure: Support reallyall option also for --enable-mods-static.
     [Rainer Jung]

  *) mod_socache_dc: add --with-distcache to configure for choosing
     the distcache installation directory. [Rainer Jung]

  *) mod_socache_dc: use correct build variable MOD_SOCACHE_DC_LDADD
     instead of MOD_SOCACHE_LDADD in build macro. [Rainer Jung]

  *) mod_lua, mod_deflate: respect platform specific runpath linker
     flag. [Rainer Jung]

  *) configure: Only link the httpd binary against PCRE. No other support
     binary needs PCRE. [Rainer Jung]

  *) configure: tolerate dependency checking failures for modules if
     they have been enabled implicitely. [Rainer Jung]

  *) configure: Allow to specify module specific custom linker flags via
     the MOD_XXX_LDADD variables. [Rainer Jung]

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Changes with Apache 2.3.13

  *) ab: Support specifying the local address to use. PR 48930.
     [Peter Schuller <scode spotify com>]

  *) core: Add support to ErrorLogFormat for logging the system unique
     thread id under Linux. [Stefan Fritsch]

  *) event: New AsyncRequestWorkerFactor directive to influence how many
     connections will be accepted per process. [Stefan Fritsch]

  *) prefork, worker, event: Rename MaxClients to MaxRequestWorkers which
     describes more accurately what it does. [Stefan Fritsch]

  *) rotatelogs: Add -p argument to specify custom program to invoke
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     after a log rotation.  PR 51285. [Sven Ulland <sveniu ifi.uio.no>, 
     Joe Orton]
  *) mod_ssl: Don't do OCSP checks for valid self-issued certs. [Kaspar Brand]

  *) mod_ssl: Avoid unnecessary renegotiations with SSLVerifyDepth 0.
     PR 48215. [Kaspar Brand]

  *) mod_status: Display information about asynchronous connections in the
     server-status. PR 44377. [Stefan Fritsch]

  *) mpm_event: If the number of connections of a process is very high, or if
     all workers are busy, don't accept new connections in that process.
     [Stefan Fritsch]

  *) mpm_event: Process lingering close asynchronously instead of tying up
     worker threads. [Jeff Trawick, Stefan Fritsch]

  *) mpm_event: If MaxMemFree is set, limit the number of pools that is kept
     around. [Stefan Fritsch]

  *) mpm_event: Fix graceful restart aborting connections. PR 43359.
     [Takashi Sato <takashi lans-tv com>]

  *) mod_ssl: Disable AECDH ciphers in example config. PR 51363.
     [Rob Stradling <rob comodo com>]

  *) core: Introduce new function ap_get_conn_socket() to access the socket of
     a connection. [Stefan Fritsch]

  *) mod_data: Introduce a filter to support RFC2397 data URLs. [Graham
     Leggett]

  *) mod_userdir/mod_alias/mod_vhost_alias: Correctly set DOCUMENT_ROOT,
     CONTEXT_DOCUMENT_ROOT, CONTEXT_PREFIX. PR 26052. PR 46198.
     [Stefan Fritsch]

  *) core: Allow to override document_root on a per-request basis. Introduce
     new context_document_root and context_prefix which provide information
     about non-global URI-to-directory mappings (from e.g. mod_userdir or
     mod_alias) to scripts. PR 49705. [Stefan Fritsch]

  *) core: Add <ElseIf> and <Else> to complement <If> sections.
     [Stefan Fritsch]

  *) mod_ext_filter: Remove DebugLevel option in favor of per-module loglevel.
     [Stefan Fritsch]

  *) mod_include: Make the "#if expr" element use the new "ap_expr" expression
     parser. The old parser can still be used by setting the new directive
     SSILegacyExprParser. [Stefan Fritsch]

  *) core: Add some features to ap_expr for use by mod_include: a restricted
     mode that does not allow to bypass request access restrictions; new
     variables DOCUMENT_URI (alias for REQUEST_URI), LAST_MODIFIED; -A as an
     alias for -U; an additional data entry in ap_expr_eval_ctx_t for use by
     the consumer; an extensible ap_expr_exec_ctx() API that allows to use that
     data entry. [Stefan Fritsch]

  *) mod_include: Merge directory configs instead of one SSI* config directive
     causing all other per-directory SSI* config directives to be reset.
     [Stefan Fritsch]

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  *) mod_charset_lite: Remove DebugLevel option in favour of per-module
     loglevel. [Stefan Fritsch]

  *) core: Add ap_regexec_len() function that works with non-null-terminated
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