* Bring /etc/grub.d/10_lupin up to date with /etc/grub.d/10_linux (LP: #771732): - Enable menu entry translation. - Set classes for the benefit of gfxmenu themes. - Handle rootflags for btrfs. - Add vt.handoff=7 if a splash screen is active. - Don't save a new default entry if recovery mode is selected. - Set gfxpayload=keep unless the hardware is blacklisted. - Cache commands required to access /boot. - Print extra debugging messages in recovery mode. - Move second and subsequent kernels to a submenu. - Check GRUB_DISABLE_RECOVERY rather than GRUB_DISABLE_LINUX_RECOVERY.