Log Message:
Update subversion to 1.8.11.

This release addresses two security issues:
    CVE-2014-3580: mod_dav_svn DoS from invalid REPORT requests.
    CVE-2014-8108: mod_dav_svn DoS from use of invalid transaction names.

Version 1.8.11
(15 Dec 2014, from /branches/1.8.x)
http://svn.apache.org/repos/asf/subversion/tags/1.8.10

 User-visible changes:
  - Client-side bugfixes:
    * checkout/update: fix file externals failing to follow history and
      subsequently silently failing (issue #4185)
    * patch: don't skip targets in valid --git difs (r1592014, r1592034)
    * diff: make property output in diffs stable (r1589360)
    * diff: fix diff of local copied directory with props (r1619380, r1619393)
    * diff: fix changelist filter for repos-WC and WC-WC (r1621978, r1621981)
    * remove broken conflict resolver menu options that always error out
      (r1620332)
    * improve gpg-agent support (r1600331, r1600348, 1600368, r1600563,
      r1600781)
    * fix crash in eclipse IDE with GNOME Keyring (issue #3498)
    * fix externals shadowing a versioned directory (issue #4085)
    * fix problems working on unix file systems that don't support
      permissions (r1612225)
    * upgrade: keep external registrations (issue #4519)
    * cleanup: iprove performance of recorded timestamp fixups (r1633126)
    * translation updates for German

  - Server-side bugfixes:
    * disable revprop caching feature due to cache invalidation problems
      (r1543594, r1619774, r1619105, r1619118, r1619153, r1619802)
    * skip generating uniquifiers if rep-sharing is not supported (r1561426)
    * mod_dav_svn: reject requests with missing repository paths (r1643409)
    * mod_dav_svn: reject requests with invalid virtual transaction names
      (r1643437)
    * mod_dav_svn: avoid unneeded memory growth in resource walking
      (issue #4531)

 Developer-visible changes:
  - General:
    * make sure all members of the repos layer notify struct are valid,
      fixes crashes in API users using all members (r1616131)
    * properly generate a version resource when building on Windows (r1542610,
      r1564576, r1568180)
    * fix LIBTOOL_M4 and LIBTOOL_CONFIG variable not be evaluated properly
      during a unix build (r1637826)
    * allow the use of libtool 2.4.3 (r1640862, r1640873, r1643793)