Update

ssh

It turns out that the "ssh" option to the kernel causes the ssh daemon to start before files are "restored" from "backup", leading to new host key generation on every reboot. Yuck. So I've removed the "ssh" option from the kernel and added "/etc/init.d/ssh start" to /opt/bootlocal.sh

network config

The network configuration scripts must occupy /opt/${device}.sh and look like

#/bin/bash
pkill pump
pump -h us-gso-lxrouter-0 -i eth0

and

#!/bin/bash
pkill pump
ifconfig eth1 10.1.2.3 netmask 255.255.0.0 broadcast 10.1.255.255 up