Argus needs at minimum two types of delayed notifications (this definitely post-1.0)

It should be possible to configure a subscription that will queue all notifications generated in a timeslot, and send these in bulk, when either

1. The next timeslot begins.
2. OR at a specific time of the day/week.

In addition, this type of subscription needs an option to drop notifications related to any incident that was closed/resolved before the notification is actually sent (i.e. the "Tell me everything that went wrong last night while I was sleeping, but only the things that are still issues" function)