This update fixes the following issues for subversion:
- update to 1.6.19 (bnc#780848)
- Client-side bugfixes:
* handle missing svn:date reported by svnserve gracefully

- Server-side bugfixes:
* fix possible server hang if a hook script fails to start
* fix write-through proxy commit regression introduced in 1.6.17
* partial sync drops properties when converting to adds

- Developer-visible changes:
* fix the testsuite to avoid FAILs on APR hash order