discover/pxe: check for a valid boot option before adding
[petitboot] / test /
drwxr-xr-x   ..
-rw-r--r-- 933 Makefile.am
-rwxr-xr-x 1038 hotplug-device.sh
drwxr-xr-x - lib
drwxr-xr-x - parser
drwxr-xr-x - urls