added puppet module for tahoe
Set up password for "mail" DB access

Seems dovecot doesn't support non-password socket access…

It's really bad having DB password in here. Will see what I can do about
that.

Most probably I'll need to generate a new one when I push the master
(i.e. first instance); problem will be for the slaves (next instances)
as the postfix/dovecot configuration will also need an update…

In a master/slave postgresql world, the slave will use the same
password. Ideally, I'd rather get one password per instance, so that it
doesn't blow up.

A possible way:
create dedicated user for each instance, with dedicated password.

Will dig into it. Really.
added new services