lunar-install: Fixed lilo issues

Should also detect virtio devices and add necessary configuration.
lunar-install: create proper module.index and depends.cache
lunar-install: minor fixes

- disable services not needed unless user choose to enable them
- set kernel_headers alias default to kernel-headers
- print an infobox when kernel is being installed
lunar-install: removed ssh server key step, now handled by a one-shot systemd service
iso.mk: random-seed is really located in var/lib/systemd