Break out the guts of svn_wc__db_wq_add() into an internal helper function for future support where work items are passed into db_op_*().
Break out the guts of svn_wc__db_wq_add() into an internal helper function
for future support where work items are passed into db_op_*().

* subversion/libsvn_wc/wc_db.c:
  (add_single_work_item): new helper function to insert a single row into
    the WORK_QUEUE table.
  (add_work_items): new function to insert 0 or more work items into a
    given SDB.
  (svn_wc__db_wq_add): gut this and just call add_work_items()

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion