Make use of new db.py lock/trx primitives. Add a mutex to fix a race in the PermissionsFile constructor.
Make use of new db.py lock/trx primitives.
Add a mutex to fix a race in the PermissionsFile constructor.


git-svn-id: 55198a34599dbf839a02c2a2ff0bd06dff76438e@305 960bbd1a-3921-0410-93bb-a35bc832efea

google/mysql-tools,google/mysql-tools