Suggested by cas@.

Otherwise they can be pulled on live.

The "full" one adds Kerberos ticket watcher GUI
and sets up avahi service to start automatically.

Based on m-p-d's domain-client pkglist and scripts from
installer-feature-network-shares-client-stage3 package.

Many thanks to boyarsh@ for his kind help to get this working.

NB: this works on cubox but is not yet ready for installers!