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                                                         -*- coding: utf-8 -*-
Changes with Apache 2.5.0

  *) mod_authnz_ldap: Return LDAP connections to the pool before the handler
     is run, instead of waiting until the end of the request. [Eric Covener]

  *) mod_ldap: Be more conservative with the last-used time for
     LDAPConnectionPoolTTL. PR54587 [Eric Covener]

  *) mod_deflate: Don't fail when flushing inflated data to the user-agent
     and that coincides with the end of stream ("Zlib error flushing inflate
     buffer"). PR 56196. [Christoph Fausak <christoph fausak glueckkanja.com>]

  *) mod_proxy: Don't limit the size of the connectable Unix Domain Socket
     paths. [Christophe Jaillet, Yann Ylavic]

  *) mod_ssl: dump SSL IO/state for the write side of the connection(s),
     like reads (level TRACE4). [Yann Ylavic]

  *) mod_proxy: Shutdown (eg. close notify) the backend connection before
     closing. [Yann Ylavic]

  *) mpm_event[opt]: Send the SSL close notify alert when the KeepAliveTimeout
     expires. PR54998. [Yann Ylavic]

  *) mod_ssl: Ensure that the SSL close notify alert is flushed to the client.
     PR54998. [Tim Kosse <tim.kosse filezilla-project.org>, Yann Ylavic]

  *) mod_log_config: Add GlobalLog to allow a globally defined log to
     be inherited by virtual hosts that define a CustomLog.
     [Edward Lu <Chaosed0 gmail.com>]

  *) MPMs: Support SO_REUSEPORT to create multiple duplicated listener
     records for scalability. [Yingqi Lu <yingqi.lu@intel.com>,
     Jeff Trawick, Jim Jagielski]

  *) mod_proxy_html: support automatic detection of doctype and processing
     of FPIs. PR56285 [Micha Lenk <micha lenk info>, Nick Kew]

  *) mod_proxy_html: skip documents shorter than 4 bytes
     PR 56286 [Micha Lenk <micha lenk info>]

  *) mod_proxy_fdpass: Fix computation of the size of 'struct sockaddr_un'
     when passed to 'connect()'.
     [Graham Dumpleton <grahamd apache org>]

  *) core: Add ap_mpm_resume_suspended() API to allow a suspended connection
     to resume. PR56333
     [Artem <artemciy gmail.com>, Edward Lu <Chaosed0 gmail.com>]

  *) core: Add ap_mpm_register_socket_callback_timeout() API. [Eric Covener]

  *) mod_proxy_wstunnel: Honor ProxyWebsocketIdleTimeout in asynchronous
     processing mode. [Eric Covener]

  *) mod_authnz_ldap: Fail explicitly when the filter is too long. Remove
     unnecessary apr_pstrdup() and strlen(). [Graham Leggett]

  *) Add the ldap-search option to mod_authnz_ldap, allowing authorization
     to be based on arbitrary expressions that do not include the username.
     [Graham Leggett]

  *) Add the ldap function to the expression API, allowing LDAP filters and
     distinguished names based on expressions to be escaped correctly to
     guard against LDAP injection. [Graham Leggett]

  *) Add module mod_ssl_ct, which provides an implementation of Certificate
     Transparency (RFC 6962) for httpd. [Jeff Trawick]

  *) mod_proxy: Preserve original request headers even if they differ
     from the ones to be forwarded to the backend. PR 45387.
     [Yann Ylavic]

  *) mod_remoteip: Prevent an external proxy from presenting an internal
     proxy. PR 55962. [Mike Rumph]

  *) mod_ssl: Add hooks to allow other modules to perform processing at
     several stages of initialization and connection handling. See
     mod_ssl_openssl.h. [Jeff Trawick]

  *) mod_proxy_wstunnel: Avoid sending error responses down an upgraded
     websockets connection as it is being close down. [Eric Covener]
  
  *) mod_proxy_wstunnel: Allow the administrator to cap the amount
     of time a synchronous websockets connection stays idle with
     ProxyWebsocketIdleTimeout. [Eric Covener]

  *) mod_proxy_wstunnel: Change to opt-in for asynchronous support, adding
     directives ProxyWebsocketAsync and ProxyWebsocketAsyncDelay.
     [Eric Covener]

  *) mod_proxy_wstunnel: Stop leaking websockets backend connections under
     event MPM (trunk-only). [Eric Covener]

  *) mod_proxy_http: Add detach_backend hook (potentially usable
     in other proxy scheme handlers). [Jeff Trawick]

  *) mod_deflate: Add DeflateAlterETag to control how the ETag
     is modified. The 'NoChange' parameter mimics 2.2.x behavior.
     PR 45023, PR 39727. [Eric Covener]

  *) mod_rewrite: Add 'BNF' (backreferences-no-plus) flag to RewriteRule to
     allow spaces in backreferences to be encoded as %20 instead of '+'.
     [Eric Covener]
     
  *) mod_rewrite: Support an optional list of characters to escape in the
     argument for the 'B' (escape backreferences) flag. [Eric Covener]

  *) mod_ssl: Add SSLOCSPUseRequestNonce directive to control whether or not
     OCSP requests should use a nonce to be checked against the responder's
     one. PR 56233. [ Yann Ylavic ]

  *) mod_dir: Default to 2.2-like behavior and skip execution when method is
     neither GET nor POST, such as for DAV requests. PR 54914. [Chris Darroch]

  *) mod_rewrite: Rename the handler that does per-directory internal
     redirects to "rewrite-redirect-handler" from "redirect-handler" so
     it is less ambiguous and less likely to be reused. [Eric Covener]

  *) mod_rewrite: Protect against looping with the [N] flag by enforcing a
     default limit of 10000 iterations, and allowing each rule to change its
     limit. [Eric Covener]

  *) mod_ssl: Fix config merging of SSLOCSPEnable and SSLOCSPOverrideResponder.
     [Jeff Trawick]

  *) Add HttpContentLengthHeadZero and HttpExpectStrict directives.
     [Yehuda Sadeh <yehuda inktank com>, Justin Erenkrantz]

  *) mod_ssl: Add -t -DDUMP_CA_CERTS option which dumps the filenames of all
     configured SSL CA certificates to stdout the same way as DUMP_CERTS does.
     [Jan Kaluza]

  *) mod_ssl: Don't flush when an EOS is received. Prepares mod_ssl
     to support write completion. [Graham Leggett]

  *) core: Add parse_errorlog_arg callback to ap_errorlog_provider
     to allow providers to check the ErrorLog argument. [Jan Kaluza]

  *) mod_cgid: Use the servers Timeout for each read from a CGI script,
     allow override with new CGIDRequestTimeout directive. PR43494
     [Eric Covener, Toshikuni Fukaya <toshikuni-fukaya cybozu co jp>]

  *) core: ensure any abnormal exit is reported to stderr if it's a tty.
     PR 55670 [Nick Kew]

  *) mod_lua: Let the Inter-VM get/set functions work with a global
     shared memory pool instead of a per-process pool. [Daniel Gruno]

  *) ldap: Support ldaps when using the Microsoft LDAP SDK.
     PR 54626. [Jean-Frederic Clere]

  *) mod_proxy: Add ap_connection_reusable() for checking if a connection
     is reusable as of this point in processing. [Jeff Trawick]

  *) mod_authnz_ldap: Change default value of AuthLDAPMaxSubGroupDepth to 0
     to avoid performance problems when subgroups aren't in use. [Eric Covener]

  *) mod_syslog: New module implementing syslog ap_error_log provider.
     Previously, this code was part of core, now it's in separate module.
     [Jan Kaluza]

  *) core: Add ap_errorlog_provider to make ErrorLog logging modular. Move
     syslog support from core to new mod_syslog. [Jan Kaluza]

  *) mod_status, mod_echo: Fix the display of client addresses.
     They were truncated to 31 characters which is not enough for IPv6 addresses.
     PR 54848 [Bernhard Schmidt <berni birkenwald de>]

  *) core: Add ap_log_data(), ap_log_rdata(), etc. for logging buffers.
     [Jeff Trawick]

  *) 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 <jkaluza redhat.com>]

  *) mod_authnz_ldap: Support primitive LDAP servers that do not accept
     filters, such as "SDBM-backed LDAP" on z/OS, by allowing a special
     filter "none" to be specified in AuthLDAPURL. [Eric Covener]

  *) mod_file_cache: mod_file_cache should be able to serve files that
     haven't had a Content-Type set via e.g. mod_mime. [Eric Covener]

  *) core: merge AllowEncodedSlashes from the base configuration into
     virtual hosts. [Eric Covener]

  *) AIX: Install DSO's with "cp" instead of "install" in instdso.sh
     [Eric Covener]

  *) mod_ldap: Don't keep retrying if a new LDAP connection times out.
     [Eric Covener]

  *) mod_deflate: permit compilation of mod_deflate against a zlib that has
     been configured with -D Z_PREFIX, which redefines the token "deflate".
     [Eric Covener]

  *) mod_auth_digest: Use the secret when generating nonces in all cases and
     not only when AuthName is used in .htaccess files (this change may cause
     problems if used with round robin load balancers). Don't regenerate the
     secret on graceful restarts. PR 54637 [Stefan Fritsch]

  *) core: Remove apr_brigade_flatten(), buffering and duplicated code
     from the HTTP_IN filter, parse chunks in a single pass with zero copy.
     Reduce memory usage by 48 bytes per request. [Graham Leggett]

  *) core: Stop the HTTP_IN filter from attempting to write error buckets
     to the output filters, which is bogus in the proxy case. Create a
     clean mapping from APR codes to HTTP status codes, and use it where
     needed. [Graham Leggett]

  *) mod_proxy: Ensure network errors detected by the proxy are returned as
     504 Gateway Timout as opposed to 502 Bad Gateway, in order to be
     compliant with RFC2616 14.9.4 Cache Revalidation and Reload Controls.

  *) mod_dav: mod_dav overrides dav_fs response on PUT failure. PR 35981
     [Basant Kumar Kukreja <basant.kukreja sun.com>, Alejandro Alvarez
     <alejandro.alvarez.ayllon cern.ch>]

  *) mod_ldap: LDAP connections used for authentication were not respecting
     LDAPConnectionPoolTimeout. PR 54587

  *) core: ap_rgetline_core now pulls from r->proto_input_filters.

  *) mod_proxy_html: process parsed comments immediately.
     Fixes bug 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 [Nick Kew]

  *) core: Add option to add valgrind support. Use it to reduce false positive
     warnings in mod_ssl. [Stefan Fritsch]

  *) mod_authn_file, mod_authn_dbd, mod_authn_dbm, mod_authn_socache:
     Cache the result of the most recent password hash verification for every
     keep-alive connection. This saves some expensive calculations.
     [Stefan Fritsch]

  *) http: Remove support for Request-Range header sent by Navigator 2-3 and
     MSIE 3. [Stefan Fritsch]

  *) core, http: Extend HttpProtocol with an option to enforce stricter HTTP
     conformance or to only log the found problems. [Stefan Fritsch]

  *) core: Correctly parse an IPv6 literal host specification in an absolute
     URL in the request line. [Stefan Fritsch]

  *) EventOpt MPM

  *) core: Add LogLevelOverride directive that allows to override the
     loglevel for clients from certain IPs. This also works for things
     like the SSL handshake where <If> LogLevel ... </If> is evaluated
     too late. [Stefan Fritsch]

  *) core: Add new directive Warning to issue warnings from a configuration
     file. Both Warning and Error now generate a timestamped log message.
     [Fabien Coelho]

  *) ap_expr: Add SERVER_PROTOCOL_VERSION, ..._MAJOR, and ..._MINOR
     variables. [Stefan Fritsch]

  *) core: New directive RegisterHttpMethod for registering non-standard
     HTTP methods. [Stefan Fritsch]

  *) core: New directive HttpProtocol which allows to disable HTTP/0.9
     support. [Stefan Fritsch]

  *) mod_allowhandlers: New module to forbid specific handlers for specific
     directories. [Stefan Fritsch]

  *) mod_systemd: New module, for integration with systemd on Linux.
     [Jan Kaluza <jkaluza redhat.com>]

  *) WinNT MPM: Store pid and generation for each thread in scoreboard
     to allow tracking of threads from exiting children via mod_status
     or other such mechanisms. [Jeff Trawick]

  *) The following now respect DefaultRuntimeDir/DEFAULT_REL_RUNTIMEDIR:
     - APIs: ap_log_pid(), ap_remove_pid, ap_read_pid()
     - core: the scoreboard (ScoreBoardFile), pid file (PidFile), and
       mutexes (Mutex)
     - mod_cache: thundering herd lock directory
     - mod_lbmethod_heartbeat, mod_heartmonitor: heartbeat storage file
     - mod_ldap: shared memory cache
     - mod_socache_shmcb, mod_socache_dbm: shared memory or dbm for cache
     [Jeff Trawick]

  *) suexec: Add --enable-suexec-capabilites support on Linux, to use
     setuid/setgid capability bits rather than a setuid root binary.
     [Joe Orton]

  *) suexec: Add support for logging to syslog as an alternative to logging
     to a file; configure --without-suexec-logfile --with-suexec-syslog.
     [Joe Orton]

  *) mod_ssl: Add support for TLS Next Protocol Negotiation. PR 52210.
     [Matthew Steele <mdsteele google.com>]

  *) cross-compile: allow to provide CC_FOR_BUILD so that gen_test_char will
     be compiled by the build compiler instead of the host compiler.
     Also set CC_FOR_BUILD to 'cc' when cross-compilation is detected.
     PR 51257. [Guenter Knauf]

  *) core: In maintainer mode, replace apr_palloc with a version that
     initializes the allocated memory with non-zero values, except if
     AP_DEBUG_NO_ALLOC_POISON is defined. [Stefan Fritsch]

  *) mod_policy: Add a new testing module to help server administrators
     enforce a configurable level of protocol compliance on their
     servers and application servers behind theirs. [Graham Leggett]

  *) mod_firehose: Add a new debugging module able to record traffic
     passing through the server in such a way that connections and/or
     requests be reconstructed and replayed. [Graham Leggett]

  *) mod_noloris

  *) APREQ

  *) Simple MPM

  *) mod_serf

  [Apache 2.5.0-dev includes those bug fixes and changes with the
   Apache 2.4.xx tree as documented below, except as noted.]

Changes with Apache 2.4.x and later:

  *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/CHANGES?view=markup

Changes with Apache 2.2.x and later:

  *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.2.x/CHANGES?view=markup

Changes with Apache 2.0.x and later:

  *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.0.x/CHANGES?view=markup
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