db: Update the dnsandmx_admin schema

In commit aecc19a ("activate_account: Store the creation date in the
passwd table") we added a column to the passwd table, but that commit
forgot to update the db schema as stored in db/ so update it now.

Signed-off-by: Andrew Clayton <andrew@dnsandmx.com>
utmp: Log the remote port for the login

This logs the port on the remote end that the connection originated
from. In the case of NAT this will be a port on the NAT device.

The main point of this is to allow some chance of linking a login back
to a specific host behind NAT where the logged port will be a port on
the NAT device which you can use to link back to a host behind the NAT
e.g by looking in /proc/net/ip_conntrack on Linux.

Signed-off-by: Andrew Clayton <andrew@dnsandmx.com>