• Add support for --sysprep and --driver to support UEFI System Prep
  Applications and UEFI Drivers.
• use efivar's error reporting facility, and show error traces when
  "-v -v" is used.
• Still yet better error codes returned on failures.
• Add -m and -M to support Memory Address Range Mirroring.
• Add efibootdump, to examine Boot* variables found in tarballs in bug
  reports and similar.
• miscellaneous bugfixes.