o Fix apache configuration template condition. o Uses alternc.install to update apache configuration files against
modified templates.
o Generated Mailman configuration is now backuped in /var/backups/alternc
in order to prevent overwrite of user modification (despite the
warning).
The postinst script will fail in this case, displaying a message telling
the user how to correct the situation.
o Automatically creates the "mailman" list (a.k.a site list) if it
doesn't exist. (Closes: #157, #365, #560)