d/[..]/grub.d/xen.cfg: improve docs even more
Ok, I finally tried this, and it's really great that I now have correct
(different) linux kernel options generated for just linux and xen+dom0.
Do more cosmetics and reorganizing to make this wall of comments better
parseable by the eye. It was not obvious to me where sections started
and ended, and I like to have first the explanation and then at the end
the actual variables you can set.
Signed-off-by: Hans van Kranenburg <hans@knorrie.org>
Acked-by: Ian Jackson <ijackson@chiark.greenend.org.uk>