Where appropriate, use the modern terms for the one true time base
(UTC) rather than the archaic (GMT) in comments. Except where the
comments are making fun of people doing this (and pedants who insist
on the new terms).


git-svn-id: svn+ssh://svn.freebsd.org/base/head@275985 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f