GRUB Legacy is retired since Fedora 19, hence its support can be
removed.
This brings a noticeable simplification of memtest-setup script. The
new-memtest-pkg script is only tied to GRUB Legacy, so it's no longer
needed. Without this script, grubby and util-linux dependencies can
also be removed.
The memtest-setup man page didn't contain all available options and
also referred to GRUB Legacy, hence it's completely rewritten. The new
man page is also used as a template for memtest-setup help message.
Signed-off-by: Jan Hlavac <jhlavac@redhat.com>
