Add munin to /etc/services

Add munin to /etc/services

The muninlite postinst fails to add munin to /etc/services.

This patch removes this broken postinst and add an entry for munin in
/etc/services. This should have been done when the rest of the
/etc/services postinsts were being removed (changesets 26142-26149).

Signed-off-by: Jonathan McCrohan <jmccrohan@gmail.com>
SVN-Revision: 30983