In the latest version, attempting to set ./auto/config --binary-images 'hdd' --bootloaders 'grub-efi' will cause lb config to fail with E: You have selected an invalid combination of bootloaders and live image type; the grub-* bootloaders are not compatible with hdd and netboot types. Is there a reason for this? Since grub was designed for hdds, why does grub-efi only support iso-hybrid?