added mapping for sql backend
added mapping for sql backend

git-svn-id: d5c24efae811dae08d6299c6b502251aa5b3832a@979697 13f79535-47bb-0310-9956-ffa450edef68

commoncrawl/nutch,commoncrawl/nutch,commoncrawl/nutch,commoncrawl/nutch