Include support for rescuezilla

[caston1981]

I created a inc-rescuezilla.cfg for Rescuezilla
I based on the nixos example using loopback.cfg given by thias.

# Rescuezilla
function add_menu_rescuezilla {
isofile="$1"

regexp
--set 1:isoname
--set 2:version
--set 3:arch
"^${isopath}/rescuezilla/rescuezilla-([0-9.]+)-([^-]+).iso"$ "${isofile}"

menuentry "Rescuezilla Live ${version} ${arch}" "${isofile}" "${isoname}" --class rescuezilla {
set isofile=$2
set isoname=$3
use "${isoname}"
loop $isofile
# Change root might not be necessary, depending on Rescuezilla's boot process
change_root (loop)
set iso_path=$isofile
export iso_path
# Point to the actual loopback configuration file for Rescuezilla (if it exists)
configfile /boot/grub/loopback.cfg
# Restore root might not be necessary
restore_root
}
}

for_each_sorted add_menu_rescuezilla "$isopath"/rescuezilla/rescuezilla-*.iso

To grub.cfg I have added:

if any_exists ${isopath}/rescuezilla/rescuezilla*.iso; then
menuentry "Rescuezilla >" --class rescuezilla {
configfile "${prefix}/inc-rescuezilla.cfg"
}
fi

I rebuilt the USB and have it working. I did have some issue with files being overwritten when running the script but I have things going now.

I also had to add an entry in the README.md file so it would create a folder for the iso when running the script:

• rescuezilla`