This adds a new livemedia-creator argument, --extra-boot-args, which can
be used to add arguments to the kernel command-line in the templates.
Resolves: rhbz#1689314
lockdown.efi only exists in the beta, but it'll probably also exist in
the 7.1 beta. So don't toss this stuff out completely, but don't use it
if shim doesn't provide lockdown.efi either.
Resolves: rhbz#1071380
Signed-off-by: Peter Jones <pjones@redhat.com>
Make kernel args the same in every config.
Put 'quiet' at the end of the line - it's usually the first thing a user removes when debugging.
Fill missing product versions in.
Distinguish between 'install' (installation media) and 'start' (live media).
