Move client_dbname to domainownder_dbname

[Angels]

I would love if you would move the prefix of CLIENT_DATABASE name to DOMAINUSER_DATABASE name, or anything else which is domainuser based . This feature should be optional to the existing prefix.

The main problem with database name is: If domainusers create new databases they should not interfer with other/existing databases.

I only have one client/reseller in Plesk, by that the new prefix feature doesn't solve that problem.