This shell script is a part of the dtc-xen package that is to be used by the
dtc panel to manage a Xen VPS server.
When doing it's VPS install, dtc_reinstall_os will call a script to do the setup
of the network. dtc-xen_domUconf_network_debian does the job when the VPS type
is Debian (that is: works also for Ubuntu based VPS).