Split out asciidump, utf8dump, bindump, and hexdump into a separate
file efiutil.c. Implement new efi_print_load_option for printing out
the EFI_LOADER_OPTION data structure used to specify different options
to the UEFI boot manager.
Sponsored by: Netflix
Many UEFI variables are UCS2 strings (some NUL terminated, others
not). Add --utf8 (-u) to convert UCS2 strings to UTF8 before printing.
Sponsored by: Netflix
line interface to the Linux program, as well as adding a number of
useful features to make using it in shell scripts easier (since we
don't have a filesystem to fall back on interacting with).
Differential Revision: https://reviews.freebsd.org/D8128
Reviewed by: kib@, wblock@, Ganael Laplanche
