Tweak copy to use within-a-single DB operations more often.
Tweak copy to use within-a-single DB operations more often.

* subversion/libsvn_wc/wc_db.c
  (cross_db_copy): Renamed from temp_cross_db_copy.
  (svn_wc__db_op_copy): Adjust call to renamed function, check wcroots
   to determine whether this is a cross-db copy.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1003546 13f79535-47bb-0310-9956-ffa450edef68

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