Description of problem:
The mailman init.d service script doesn't seem to follow
the conventions of the rest of our init.d scripts.
When no command argument is passed to it, it doesn't give
any help output.

How reproducible:
every time

Steps to Reproduce:
1. # service mailman
  
Actual results:
No output.

Expected results:
Usage: /etc/init.d/mailman {start|stop|restart|condrestart|status}