This changes the following chain after nixos-rebuild switch with modified tunnel interfaces:
stop network-setup -> stop TUN-netdev -> stop network-addresses-TUN -> start network-addresses-TUN (fails since it depends on TUN-netdev which is off).
Chain after this change:
stop TUN-netdev -> stop network-setup -> stop network-addresses-TUN -> start TUN-netdev -> start network-addresses-TUN -> start network-setup
Signed-off-by: Egor Savkin <es@m-labs.hk>