[feladat @ 76]
Changed some of the functions that are used for the listing of (all)
zones. Instead of getting all zones from the database, it now only
requests exactlty what it needs. Considerable perfomance improvement.
printf(_('You are about to delete a slave zone of which the master nameserver, %s, is a supermaster. Deleting the zone now, will result in temporary removal only. Whenever the supermaster sends a notification for this zone, it will be added again!'),$slave_master);