This subversion update includes a security fix and several
minor changes.

- update to 1.7.13 [bnc#836245]
- User-visible changes:
- General
* merge: fix bogus mergeinfo with conflicting file merges
* diff: fix duplicated path component in '--summarize' output
* ra_serf: ignore case when checking certificate common names
- Server-side bugfixes:
* svnserve: fix creation of pid files CVE-2013-4277
* mod_dav_svn: better status codes for commit failures
* mod_dav_svn: do not map requests to filesystem
- Developer-visible changes:
- General:
* don't use uninitialized variable to produce an error code
- Bindings:
* swig-pl: fix SVN::Client not honoring config file settings
* swig-pl & swig-py: disable unusable svn_fs_set_warning_func