*** replace g_ether with more modern configFS
see these links:
http://irq5.io/2016/12/22/raspberry-pi-zero-as-multiple-usb-gadgets/
https://github.com/mame82/P4wnP1/blob/master/boot/init_usb.sh
https://gist.github.com/Gadgetoid/c52ee2e04f1cd1c0854c3e77360011e2
http://www.circuitbasics.com/raspberry-pi-zero-ethernet-gadget/