OpenEmbedded "poky" with some sysmocom specific modifications. Mostly used only up to sysmocom release 201310, but the "pyro" branch is still used for 201705
[hfreyther: I asked henning to move forward and not test this. We
do not have dhcp/dynamic config in /etc/network/interfaces and the
link will always be up on the idu due it being connected to a switch.
ifplugd is not doing anything useful in this context]
Fixes: SYS#1535