Manual: _SYSTEMD_UNIT -> -u
Don't start nscd if it's not already running

"systemctl restart" will start a service if it's not already
running...
Increase PostgreSQL's shutdown timeout to 3 minutes

1 minute is too short, given that the autovacuum launcher often seems
to require exactly 1 minute to shut down.  (This might be a bug
related to autovacuum_naptime.)
Adding miniupnpc to gnunet path, to be able to use upnp