Correctly parse the svn:externals definition when given only two arguments. Also, actually parse the peg revision from the url provided.  Followup to r23746.
Correctly parse the svn:externals definition when given only two arguments.
Also, actually parse the peg revision from the url provided.  Followup to
r23746.

* subversion/libsvn_wc/props.c
  (parse_external_parts_with_peg_rev):  Correct the ordering for the target and
  source for svn:externals parsing.  Parse the url for the peg revision.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@863845 13f79535-47bb-0310-9956-ffa450edef68

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