apkovl not loaded from usb when booting from CD unless ovl_dev is set on boot parameters
When booting from CD the apkovl saved on usb is not loaded on boot.
steps to reproduce:
- boot from cd
- setup-alpine (disk none and lbu usb, etc.)
- lbu ci -e
- verify the apkovl file is on the usb
- reboot from cd
- the opkovl is not loaded.
WORKAROUND: add ovl_dev=usbdisk:vfat to the boot parameters, or alter isolinux.cfg and make new .iso
tested on versions 2.6.5 and 2.6.4
(from redmine: issue id 2269, created on 2013-10-07, closed on 2017-04-08)