* Resynchronise with Debian. Remaining changes: - Default to hiding the menu; holding down Shift at boot will show it. - Add crashkernel option. - Bypass menu unless other OSes are installed or Shift is pressed. - Show the boot menu if the previous boot failed. - Check hardware support before using gfxpayload=keep. - Set vt.handoff=7 for smooth handoff to kernel graphical mode. - In recovery mode, add nomodeset to the Linux kernel arguments, and remove the 'set gfxpayload=keep' command. - Handle probing striped DM-RAID devices.