fixes #1: If comment moderation is turned on, the confirmation-e-mail should be sent

Used Testcases:
- with moderation turned on:
-- double-check turned on:
--- confirmation e-mail does work?
--- notification does work?
-- double-check turned off: notification does work?

- with moderation turned off:
-- double-check turned on:
--- confirmation e-mail does work?
--- notification does work?
-- double-check turned off: notification does work?