Update "apache22" package to version 2.2.18. Changes since version 2.2.17:
- Log an error for failures to read a chunk-size, and return 408 instead
  413 when this is due to a read timeout.  This change also fixes some cases
  of two error documents being sent in the response for the same scenario.
  [Eric Covener] Bug 49167
- core: Only log a 408 if it is no keepalive timeout. Bug 39785
  [Ruediger Pluem,  Mark Montague <markmont umich.edu>]
- core: Treat timeout reading request as 408 error, not 400.
  Log 408 errors in access log as was done in Apache 1.3.x.
  Bug 39785 [Nobutaka Mantani <nobutaka nobutaka.org>, Stefan Fritsch,
  Dan Poirier]
- Core HTTP: disable keepalive when the Client has sent
  Expect: 100-continue
  but we respond directly with a non-100 response.  Keepalive here led
  to data from clients continuing being treated as a new request.
  Bug 47087.  [Nick Kew]
- htpasswd: Change the default algorithm for htpasswd to MD5 on all
  platforms. Crypt with its 8 character limit is not useful anymore;
  improve out of disk space handling (Bug 30877); print a warning if
  a password is truncated by crypt. [Stefan Fritsch]
- mod_win32: Added shebang check for '! so that .vbs scripts work as CGI.
  Win32's cscript interpreter can only use a single quote as comment char.
  [Guenter Knauf]
- configure: Fix htpasswd/htdbm libcrypt link errors with some newer
  linkers. [Stefan Fritsch]
- MinGW build improvements.  Bug 49535.  [John Vandenberg
  <jayvdb gmail.com>, Jeff Trawick]
- mod_ssl, ab: Support OpenSSL compiled without SSLv2 support.
  [Stefan Fritsch]
- core: AllowEncodedSlashes new option NoDecode to allow encoded slashes
  in request URL path info but not decode them. Bug 35256,
  Bug 46830.  [Dan Poirier]
- mod_rewrite: Allow to unset environment variables. Bug 50746.
  [Rainer Jung]
- suEXEC: Add Suexec directive to disable suEXEC without renaming the
  binary (Suexec Off), or force startup failure if suEXEC is required
  but not supported (Suexec On).  [Jeff Trawick]
- mod_proxy: Put the worker in error state if the SSL handshake with the
  backend fails. Bug 50332.
  [Daniel Ruggeri <DRuggeri primary.net>, Ruediger Pluem]
- prefork: Update MPM state in children during a graceful restart.
  Allow the HTTP connection handling loop to terminate early
  during a graceful restart.  Bug 41743.
  [Andrew Punch <andrew.punch 247realmedia.com>]
- mod_ssl: Correctly read full lines in input filter when the line is
  incomplete during first read. Bug 50481. [Ruediger Pluem]
- mod_autoindex: Merge IndexOptions from server to directory context when
  the directory has no mod_autoindex directives. Bug 47766. [Eric Covener]
- mod_cache: Make sure that we never allow a 304 Not Modified response
  that we asked for to leak to the client should the 304 response be
  uncacheable. Bug 45341 [Graham Leggett]
- mod_dav: Send 400 error if malformed Content-Range header is received for
  a put request (RFC 2616 14.16). Bug 49825. [Stefan Fritsch]
- mod_userdir: Add merging of enable, disable, and filename arguments
  to UserDir directive, leaving enable/disable of userlists unmerged.
  Bug 44076 [Eric Covener]
- core: Honor 'AcceptPathInfo OFF' during internal redirects,
  such as per-directory mod_rewrite substitutions.  Bug 50349.
  [Eric Covener]
- mod_cache: Check the request to determine whether we are allowed
  to return cached content at all, and respect a "Cache-Control:
  no-cache" header from a client. Previously, "no-cache" would
  behave like "max-age=0". [Graham Leggett]
- mod_mem_cache: Add a debug msg when a streaming response exceeds
  MCacheMaxStreamingBuffer, since mod_cache will follow up with a scary
  'memory allocation failed' debug message. Bug 49604. [Eric Covener]
- proxy_connect: Don't give up in the middle of a CONNECT tunnel
  when the child process is starting to exit. Bug 50220. [Eric Covener]


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