to avoid problems, don't move .slt folder to .slt-old and then remigrate. instead, leave .slt folder alone and migrate to .slt-new. this makes restoring harder, but re-migration faster, safter and simpler. r=ccarlen,sr=bienvenu git-svn-id: svn://10.0.0.236/trunk@120496 18797224-902f-48f8-a5cc-f745e15eee43