mkinitfs: add xz compression support
With my current mkinitfs settings i can reduce the image from 16.5m to 10.5m. While this take a bit more CPU power/time it will reduce load time on netboot setups.
With my current mkinitfs settings i can reduce the image from 16.5m to 10.5m. While this take a bit more CPU power/time it will reduce load time on netboot setups.