Revision 1671164

Allow passing a revision to 'svn status', to allow retrieving a remote
status against a revision different than HEAD.

This exposes a feature we have had at the api level since <= 1.0.

* subversion/svn/status-cmd.c
  (svn_cl__status): Use revision when passed.

* subversion/svn/svn.c
  (svn_cl__cmd_table): Allow passing 'r' to svn status.