If using cmtelecom for notification, then this class must be scheduled as an mmbase cronjob. It
queues to be-send SMS-messages and then communicates with ClubMessage when this Job is
scheduled. It should run regularly, e.g. every 5 minutes or so. Or every minute. This way only
one external connection to clubmessage every 5 or 1 minutes is made.
If the implementation of SMS sending is
not CMTelecomSender (bug e.g.
EventSender), this job will do nothing.