pub const NET_VAR: &str = "GUNNAR_NET";
The variable the kernel command line declares the network in: GUNNAR_NET=eth0:dhcp,eth1:dhcp or GUNNAR_NET=eth0:10.0.2.15/24:10.0.2.2.
GUNNAR_NET=eth0:dhcp,eth1:dhcp
GUNNAR_NET=eth0:10.0.2.15/24:10.0.2.2