* subversion/mod_dav_svn/repos.c   (prep_private): Make not finding a txn resource a 404 error to allow aborting     transactions more than once without producing errors on client and server.     (Neon and serf accept a 404 as ok for an abort, but that only works if the      server really reports a 404.).
* subversion/mod_dav_svn/repos.c
  (prep_private): Make not finding a txn resource a 404 error to allow aborting
    transactions more than once without producing errors on client and server.
    (Neon and serf accept a 404 as ok for an abort, but that only works if the
     server really reports a 404.).

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion