Log Message:
Update to 1.6.4, a security release.

Version 1.6.4
(06 Aug 2009, from /branches/1.6.x)
http://svn.collab.net/repos/svn/tags/1.6.4

 User-visible changes:
 * fixed: heap overflow vulnerability on server and client
          See CVE-2009-2411, and descriptive advisory at
          http://subversion.tigris.org/security/CVE-2009-2411-advisory.txt

Version 1.6.3
(22 Jun 2009, from /branches/1.6.x)
http://svn.collab.net/repos/svn/tags/1.6.3

 User-visible changes:
  * fix segfault in WC->URL copy (r37646, -56)
  * let 'svnadmin load' tolerate mergeinfo with "\r\n" (r37768)
  * make svnsync normalize svn:* props to LF line endings (issue #3404)
  * better integration with external merge tools (r36178)
  * return a friendly error message for 'svn diff' (r37735)
  * update dsvn.el for 1.6 (r37774)
  * don't allow setting of props on out-of-date dirs under neon (r37745)
  * improve BASH completion (r36450, -52, -70, -79, -538)
  * always show tree conflicts with 'svn st' (issue #3382)
  * improve correctness of 'svn mergeinfo' (issue #3126)
  * decrease the amount of memory needed for large commits (r37894, -6)
  * work around an APR buffer overflow seen by svnsync (r37622)
  * ra_svn clients now use TCP keep-alives if available (issue #3347)
  * improve 'svn merge' perf by reducing server contact (r37491, -593, -618)
  * stop propagating self-referential mergeinfo in reintegrate merges (r37931)
  * fix NLS detection where -liconv is required for bindtextdomain() (r37827)
  * don't delete unversioned files with 'rm --keep-local' (r38015, -17, -19)
  * bump apr and apr-util versions included in deps to latest. (r37941)
  * avoid temp file name collisions with ra_serf, ra_neon (r37972)
  * fixed: potential segfault with noop file merges (r37779)
  * fixed: incorrect output with 'svn blame -g' (r37719, -23, -41)
  * fixed: bindings don't load FS libs when module search enabled (issue #3413)
  * fixed: DAV RA layers not properly handling update/switch working copy
    directory to revision/place in which it doesn't exist (issue #3414)
  * fixed: potential abort() in the working copy library (r37857)
  * fixed: memory leak in hash reading functions (r37868, -979)

 Developer-visible changes:
  * improve memory usage in file-to-stringbuf APIs (r37907)
  * reduce memory usage for temp string manipulation (r38010)