For the V-ODU we want to have vlan support as well. This requires
to use the debian ifupdown which means we need a script that creates
/run/network early enough.
On eth1 we should also use a network from the 172.16 block rather than
the 10.23 that we used on the sysmoBSC
Also, we now use 172.16.4.0/23 natively on the bridged onboard network,
this is a temporary measure so existing JBs will still connect and get
an IP address before their software is updated to use VLAN6. After they
(and all APs, BTSs, etc.) have migrated, the 172.16.4.0/23 can be
removed.
For systemd and the Debian ifupdown application we need to
have the /run/network directory. The debian init file is
creating it on the fly and we should do the same for now.