[syslinux] Default Reply-To: for this list changed

[H. Peter Anvin]

It appears people are fundamentally incapable to deal with "Reply" and
"Reply All".  Accordingly, I have changed the list to default replies to
the list; it's quite a pain to deal with in the presence of people with
Reply-To: headers and other things, but at least it should keep me from
having to deal with people trying to take things off-list at least once
a week.

	-hpa