starts transaction mode.
The connection to the Name Server is kept open until one of the DB update
operation fails or
is explicitly called.
If all the DB update operations between
are successful, a COMMIT is done.
If any DB update operation fails or if an explicit
is done, a ROLLBACK is done.
is logged in the server log.
This routine returns 0 if the operation was successful or -1 if the operation
failed. In the latter case,
is set appropriately.