added mail notification if a quota has been exceeded
Description: Implements quota mail notification. As soon as a quota is exceeded the first time, a notification message would be sent. This is useful to inform someone, for example the postmaster or a case tracking system.
Configuration: notification_enable = 1 notification_from = postmaster@localhost notification_to = email@example.com notification_subject = CBPolicyd quota for %s exceeded
(Add these configurations under the [Quota] module namespace).
Per default notifications are disabled if nothing is configured.