Revision 1458301

* subversion/include/svn_dav.h
  (SVN_DAV_NS_DAV_SVN_GET_FILE_REVS_REVERSE): Spell out "reverse" in
    the string token value.  "rvrs" makes me think of the HTTPv2
    revision root (rvr) URI space.  (Besides, the savings of 3
    characters hardly seems worth the imprecision.)