A mergeinfo sanity check for svnadmin load: Stop r0 and r1 merge source revs.
A mergeinfo sanity check for svnadmin load: Stop r0 and r1 merge source revs.

* subversion/libsvn_repos/load.c

  (renumber_mergeinfo_revs): More issue #3020 work; just say no to invalid
   merge source revs.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@941438 13f79535-47bb-0310-9956-ffa450edef68

wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion