debian: Provide an init script to run the daemon on boot.

[fwd] / debian / fw.postinst

#! /bin/sh

set -e
getent group fw >/dev/null || addgroup --system fw
getent passwd fw >/dev/null || {
  adduser --system --ingroup fw --home / fw
  usermod -c "Port forwarding daemon" -s /bin/false -g fw -G fw fw
}

#DEBHELPER#