commit 3ec0fa45c8801d1d6d57089a35332b224dea7efe
Author: Markus Stenberg <markus.stenberg@iki.fi>
Date:   Fri May 8 12:25:54 2015 +0300

    SetupInterfaceList: IPv4 is not mandatory, really. Also, starting up
    without any interfaces is perfectly valid too; they may come later.
