Synch with 2.0.x branch.

Changes with Apache 2.0.54

  *) htdigest: Fix permissions of created files.  PR 33765.  [Joe Orton]

  *) core_input_filter: Move buckets to a persistent brigade instead of

     creating a new brigade. This stop a memory leak when proxying a 

     Streaming Media Server. PR 33382. [Paul Querna]

Changes with Apache 2.0.53

  *) Fix --with-apr=/usr and/or --with-apr-util=/usr.  PR 29740.

     [Max Bowsher <maxb ukf.net>]

  *) mod_proxy: Fix ProxyRemoteMatch directive.  PR 33170.

     [Rici Lake <rici ricilake.net>]

  *) mod_proxy: Respect errors reported by pre_connection hooks.

     [Jeff Trawick]

  *) --with-module can now take more than one module to be statically

     linked: --with-module=<modtype>:<modfile>,<modtype>:<modfile>,...

     If the <modtype>-subdirectory doesn't exist it will be created and

     populated with a standard Makefile.in.  [Erik Abele]

  *) Fix the RPM spec file so that an RPM build now works. An RPM

     build now requires system installations of APR and APR-util.

     Remove some arbitrary moving around of binaries - the RPM now

     maps to the ASF build of httpd.

     [Graham Leggett]

  *) mod_dumpio, an I/O logging/dumping module, added to the

     modules/expermimental subdirectory.  [Jim Jagielski]

  *) mod_auth_ldap: Handle the inconsistent way in which the MS LDAP

     library handles special characters. PR 24437 [Jess Holle]

     library handles special characters. PR 24437.  [Jess Holle]

  *) Win32 MPM: Correct typo in debugging output.  [William Rowe]

  *) Util_ldap: Implemented the util_ldap_cache_getuserdn() API so that 

     ldap authorization only modules have access to the util_ldap 

     user cache without having to require ldap authentication as well.  

     [PR 31898] [Jari Ahonen jah progress.com, Brad Nicholes]

     PR 31898.  [Jari Ahonen jah progress.com, Brad Nicholes]

  *) mod_auth_ldap: Added the directive "Requires ldap-attribute" that

     allows the module to only authorize a user if the attribute value

     Previously this would segfault or simply not match as expected,

     depending on the platform.  [Jeff Trawick]

  *) mod_rewrite: Fix query string handling for proxied URLs. PR 14518.

     [michael teitler <michael.teitler cetelem.fr>,

      Jan Kratochvil <rcpt-dev.AT.httpd.apache.org jankratochvil.net>]

  *) mod_rewrite: Fix 0 bytes write into random memory position.

     PR 31036. [André Malo]

     [Rüiger Plü <r.pluem t-online.de>]

  *) mod_ldap: prevent the possiblity of an infinite loop in the LDAP

     statistics display. PR 29216 [Graham Leggett]

     statistics display. PR 29216.  [Graham Leggett]

  *) mod_ldap: fix a bogus error message to tell the user which file

     is causing a potential problem with the LDAP shared memory cache.

  *) mod_disk_cache: Do not store hop-by-hop headers.  [Justin Erenkrantz]

  *) Fix the re-linking issue when purging elements from the LDAP cache

     PR 24801 [Jess Holle <jessh ptc.com>]

     PR 24801.  [Jess Holle <jessh ptc.com>]

  *) mod_disk_cache: Fix races in saving responses.  [Justin Erenkrantz]

Changes with Apache 2.0.42

  *) mod_dav: Check for versioning hooks before using them.

  *) SECURITY: CAN-2002-1593 (cve.mitre.org) [CERT VU#406121]

     mod_dav: Check for versioning hooks before using them.

     [Greg Stein]

Changes with Apache 2.0.41

  *) Fix AcceptPathInfo. PR 8234  [Cliff Woolley]

  *) SECURITY: Added the APLOG_TOCLIENT flag to ap_log_rerror() to

  *) SECURITY:  CAN-2002-1592 (cve.mitre.org) [CERT VU#165803]

     Added the APLOG_TOCLIENT flag to ap_log_rerror() to

     explicitly tell the server that warning messages should be sent 

     to the client in addition to being recorded in the error log. 

     Prior to this change, ap_log_rerror() always sent warning