On the 'move-tracking-2' branch: Simplify by requiring a root URL to be specified.
On the 'move-tracking-2' branch: Simplify by requiring a root URL to be specified.

* subversion/svnmover/svnmover.c
  (usage): Update the help text.
  (parse_actions,
   sub_main): Assume and require that the anchor URL is specified in advance.

git-svn-id: 486ec3464084f62cfe8608152673c827b947faa2@1661697 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion