Revision 1486461

mod_dav: Sending a MERGE request against a URI handled by mod_dav_svn with
the source href (sent as part of the request body as XML) pointing to a
URI that is not configured for DAV will trigger a segfault.

trunk patch: http://svn.apache.org/r1485668
Submitted by: Ben Reser <ben reser.org>
Reviewed by: minfrin, covener, jorton