Bug#659435: add chgrp reminder to passwd.client

[jidanni at jidanni.org]

Package: exim4-config
Version: 4.77-1
Severity: wishlist
File: /etc/exim4/passwd.client

Add a reminder to this file:
# Be sure to do
# chgrp Debian-exim /etc/exim4/passwd.client
# when copying this file to another system!