Select a smaller set of candidate move pairs.

* subversion/libsvn_wc/wc-queries.sql
  (STMT_SELECT_MOVED_PAIR3): Make op-depth a parameter.

* subversion/libsvn_wc/wc_db_update_move.c
  (bump_moved_away): Bind additional parameter.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1431270 13f79535-47bb-0310-9956-ffa450edef68