* subversion/libsvn_ra_local/ra_plugin.c
  (svn_ra_local__do_switch): Document some arguments. Remove old comment,
    which we probably never handle on editor v1.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1449252 13f79535-47bb-0310-9956-ffa450edef68