On the '1.7.x-issue4332' branch: Fix issue #4332 ("neon OPTIONS
request on repository root causes authz access denied").

* subversion/libsvn_ra_neon/props.c
  (svn_ra_neon__do_check_path): When checking a patch against an
    invalid revision number (that is, HEAD), query its public URL rather
    than trying to resolve HEAD into a fixed revision number and then
    querying the baseline URL for the path in that revision.


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/1.7.x-issue4332@1453491 13f79535-47bb-0310-9956-ffa450edef68