On the 'move-tracking-2' branch: In the 'svnmover' program make all
operations excepty 'branchify' properly recurse into sub-branches.

* subversion/svnmover/svnmover.c
  Lots of changes.

git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/move-tracking-2@1627797 13f79535-47bb-0310-9956-ffa450edef68