Description:
Switches a mail domain's status to either 'active' or 'inactive'.
Input Variables:
$session_id, $primary_id, $status
Parameters (in $params):
None
Output:
Returns '1' if status has been changed or '0' if no changes were taken.
SQL Interaction (if status is changed to 'active'):
"UPDATE mail_domain SET active = '$status' WHERE domain_id = ".intval($primary_id)