Changes with Apache 2.3.0

  [Remove entries to the current 2.0 and 2.2 section below, when backported]

  *) Modify apr[util] .h detection to avoid breakage on VPATH builds

     using Solaris make (amoung others) and avoid breakage in ./buildconf

     when srclib/apr[-util] are symlinks rather than directories proper.

     [William Rowe]

  *) mod_speling: Stop crashing with certain non-file requests.  [Jeff Trawick]

  *) mod_proxy_ajp: Support common headers of the AJP protocol in responses.

     ErrorDocument is configured, or if using "SSLEngine optional").

     PR 37791.  [Rüdiger Plüm, Joe Orton]

  *) Chunk filter: Fix chunk filter to create correct chunks in the case that

     a flush bucket is surrounded by data buckets. [Ruediger Pluem]

  *) SECURITY: CVE-2005-3352 (cve.mitre.org)

     mod_imagemap: Escape untrusted referer header before outputting

     in HTML to avoid potential cross-site scripting.  Change also

     made to ap_escape_html so we escape quotes.  Reported by JPCERT.

     [Mark Cox]

  *) Modify apr[util] .h detection to avoid breakage on VPATH builds

     using Solaris make (amoung others) and avoid breakage in ./buildconf

     when srclib/apr[-util] are symlinks rather than directories proper.

     [William Rowe]

  *) Chunk filter: Fix chunk filter to create correct chunks in the case that

     a flush bucket is surrounded by data buckets. [Ruediger Pluem]

  *) Fix syntax error in httpd.h with strict compilers.  PR 38740.

     [Per Olausson <pao darkheim.freeserve.co.uk>]