It would be nice to support multiple notification mechanisms with a way
to disable all or part of them. So for now, this is bound to the check
but may change again in the future.
Apart from that, all notifications get written to the notification
table, so that the notifiers can do their job and ACK their own
notifications.
This allows to map the command exit codes to any other output level
which can then be reported by the notification plugin.
With the provided colors, the frontend will show them accordingly.
