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                                                         -*- coding: utf-8 -*-
Changes with Apache 2.4.31
  *) mpm_event: Do lingering close in worker(s).  [Yann Ylavic]

  *) mpm_queue: Put fdqueue code in common for MPMs event and worker.
     [Yann Ylavic]

Changes with Apache 2.4.30
  *) mod_session: Strip Session header when SessionEnv is on.  [Yann Ylavic]

  *) mod_cache_socache: Fix caching of empty headers up to carriage return.
     [Yann Ylavic]

  *) core: For consistency, ensure that read lines are NUL terminated on any
     error, not only on buffer full.  [Yann Ylavic]

  *) mod_authnz_ldap: Fix language long names detection as short name.
     [Yann Ylavic]

  *) mod_proxy: Worker schemes and hostnames which are too large are no
     longer fatal errors; it is logged and the truncated values are stored.
     [Jim Jagielski]

  *) regex: Allow to configure global/default options for regexes, like
     caseless matching or extended format.  [Yann Ylavic]

  *) mod_auth_digest: Actually use the secret when generating nonces. This change
     may cause problems if used with round robin load balancers. PR 54637
     [Stefan Fritsch]

  *) mod_proxy: Allow setting options to globally defined balancer from
     ProxyPass used in VirtualHost. Balancers are now merged using the new
     merge_balancers method which merges the balancers options.  [Jan Kaluza]

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  *) logresolve: Fix incorrect behavior or segfault if -c flag is used
     Fixes: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=823259
     [Stefan Fritsch]

  *) mod_remoteip: Add support for PROXY protocol (code donated by Cloudzilla).
     Add ability for PROXY protocol processing to be optional to donated code.
     See also: http://www.haproxy.org/download/1.5/doc/proxy-protocol.txt
     [Cloudzilla/roadrunner2@GitHub, Jim Jagielski, Daniel Ruggeri]

  *) mod_proxy, mod_ssl: Handle SSLProxy* directives in <Proxy> sections,
     allowing per backend TLS configuration.  [Yann Ylavic]

  *) mod_proxy_uwsgi: Add in UWSGI proxy (sub)module. [Roberto De Ioris,
     Jim Jagielski]

  *) mod_proxy_balancer,mod_slotmem_shm: Rework SHM reuse/deletion to not
     depend on the number of restarts (non-Unix systems) and preserve shared
     names as much as possible on configuration changes for SHMs and persisted
     files.  PR 62044.  [Yann Ylavic, Jim Jagielski]

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  *) mod_http2: obsolete code removed, no more events on beam pool destruction,
     discourage content encoders on http2-status response (where they do not work).
     [Stefan Eissing]

  *) mpm_event: Let the listener thread do its maintenance job on resources
     shortage.  PR 61979.  [Yann Ylavic]

  *) mpm_event: Wakeup the listener to re-enable listening sockets.
     [Yann Ylavic]

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  *) mod_ssl: The SSLCompression directive will now give an error if used
     with an OpenSSL build which does not support any compression methods.
     [Joe Orton]

  *) mpm_event,worker: Mask signals for threads created by modules in child
     init, so that they don't receive (implicitely) the ones meant for the MPM.
     PR 62009. [Armin Abfalterer <a.abfalterer gmail com>, Yann Ylavic]

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  *) mod_md: new experimental, module for managing domains across virtual hosts,
     implementing the Let's Encrypt ACMEv1 protocol to signup and renew 
     certificates. Please read the modules documentation for further instructions
     on how to use it. [Stefan Eissing]
  
  *) mod_proxy_html: skip documents shorter than 4 bytes
     PR 56286 [Micha Lenk <micha lenk info>]

  *) core, mpm_event: Avoid a small memory leak of the scoreboard handle, for
     the lifetime of the connection, each time it is processed by MPM event.
     [Yann Ylavic]

  *) mpm_event: Update scoreboard status for KeepAlive state.  [Yann Ylavic]

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  *) mod_ldap: Fix a case where a full LDAP cache would continually fail to 
     purge old entries and log AH01323. PR61891.  
     [Hendrik Harms <hendrik.harms gmail.com>]

  *) mpm_event: close connections not reported as handled by any module to
     avoid losing track of them and leaking scoreboard entries.  PR 61551.
     [Yann Ylavic]

  *) core: A signal received while stopping could have crashed the main
     process.  PR 61558.  [Yann Ylavic]

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  *) mod_ssl: support for mod_md added. [Stefan Eissing]
  
  *) mod_proxy_html: process parsed comments immediately. 
     Fixes bug (seen in the wild when used with IBM's HTTPD bundle)
     where parsed comments may be lost. [Nick Kew]

  *) mod_proxy_html: introduce doctype for HTML 5 [Nick Kew]

  *) mod_proxy_html: fix typo-bug processing "strict" vs "transitional"
     HTML/XHTML.  PR 56457  [Nick Kew]
  *) mpm_event: avoid a very unlikely race condition between the listener and
     the workers when the latter fails to add a connection to the pollset.
     [Yann Ylavic]

  *) core: silently ignore a not existent file path when IncludeOptional
     is used. PR 57585. [Alberto Murillo Silva <powerbsd yahoo.com>, Luca Toscano]

  *) mod_macro: fix usability of globally defined macros in .htaccess files.
     PR 57525.  [Jose Kahan <jose w3.org>, Yann Ylavic]

  *) mod_rewrite, core: add the Vary header when a condition evaluates to true
     and the related RewriteRule is used in a Directory context
     (triggering an internal redirect). [Luca Toscano]

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  *) ab: Make the TLS layer aware that the underlying socket is nonblocking,
     and use/handle POLLOUT where needed to avoid busy IOs and recover write
     errors when appropriate.  [Yann Ylavic]

  *) ab: Keep reading nonblocking to exhaust TCP or SSL buffers when previous
     read was incomplete (the SSL case can cause the next poll() to timeout
     since data are buffered already).  PR 61301 [Luca Toscano, Yann Ylavic]

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  *) mod_http2: avoid unnecessary data retrieval for a trace log. Allow certain
     information retrievals on null bucket beams where it makes sense. [Stefan Eissing]
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Changes with Apache 2.4.29

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  *) mod_unique_id: Use output of the PRNG rather than IP address and
     pid, avoiding sleep() call and possible DNS issues at startup,
     plus improving randomness for IPv6-only hosts.  [Jan Kaluza]

  *) mod_rewrite, core: Avoid the 'Vary: Host' response header when HTTP_HOST
     is used in a condition that evaluates to true. PR 58231 [Luca Toscano, Yann Ylavic]
  *) mod_http2: v0.10.12, removed optimization for mutex handling in bucket
     beams that could lead to assertion failure in edge cases.
     [Stefan Eissing] 

  *) mod_proxy: Fix regression for non decimal loadfactor parameter introduced
     in 2.4.28.  [Jim Jagielski]

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  *) mod_authz_dbd: fix a segmentation fault if AuthzDBDQuery is not set.
     PR 61546.  [Lubos Uhliarik <luhliari redhat.com>]

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  *) mod_rewrite: Add support for starting External Rewriting Programs
     as non-root user on UNIX systems by specifying username and group
     name as third argument of RewriteMap directive.  [Jan Kaluza]

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  *) core: Rewrite the Content-Length filter to avoid excessive memory
     consumption. Chunked responses will be generated in more cases
     than in previous releases.  PR 61222.  [Joe Orton, Ruediger Pluem]

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  *) mod_ssl: Fix SessionTicket callback return value, which does seem to
     matter with OpenSSL 1.1. [Yann Ylavic]
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Changes with Apache 2.4.28

  *) SECURITY: CVE-2017-9798 (cve.mitre.org)
     Corrupted or freed memory access. <Limit[Except]> must now be used in the
     main configuration file (httpd.conf) to register HTTP methods before the
     .htaccess files.  [Yann Ylavic]

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  *) event: Avoid possible blocking in the listener thread when shutting down
     connections. PR 60956.  [Yann Ylavic]

  *) mod_speling: Don't embed referer data in a link in error page.
     PR 38923 [Nick Kew]

  *) htdigest: prevent a buffer overflow when a string exceeds the allowed max
     length in a password file.
     [Luca Toscano, Hanno Böck <hanno hboeck de>]

  *) mod_proxy: loadfactor parameter can now be a decimal number (eg: 1.25).
     [Jim Jagielski]

  *) mod_proxy_wstunnel: Allow upgrade to any protocol dynamically.
     PR 61142.

  *) mod_watchdog/mod_proxy_hcheck: Time intervals can now be spefified
     down to the millisecond. Supports 'mi' (minute), 'ms' (millisecond),
     's' (second) and 'hr' (hour!) time suffixes. [Jim Jagielski]

  *) mod_http2: Fix for stalling when more than 32KB are written to a
     suspended stream.  [Stefan Eissing]

  *) build: allow configuration without APR sources.  [Jacob Champion]

  *) mod_ssl, ab: Fix compatibility with LibreSSL.  PR 61184.
     [Bernard Spil <brnrd freebsd.org>, Michael Schlenker <msc contact.de>,
      Yann Ylavic]
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