Merge r1167269 from trunk:

  * r1167269
    Also upgrade dir externals nested inside dir externals.
    Justification:
      We currently upgrade only the first level of dir externals. We should
      look for further nested externals WCs.
    Notes:
      http://svn.haxx.se/dev/archive-2011-09/0227.shtml
    Votes:
      +1: neels, stsp, philip


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/1.7.x@1167354 13f79535-47bb-0310-9956-ffa450edef68
2 files changed