Conditionally set $hsty_base to http://www.FreeBSD.org/:
- If we're not running under cgi (for the mailindex run out of cron)
- If we're running on docs.freebsd.org (because it doesn't have the style files, and the "home" link would point to docs home, not the home home)
- If we're running on people.freebsd.org, to facilitate my testing
Otherwise, keep it relative for the benefit of mirrors.
docs problem pointed out by: Mark Trettin (mkt AT trettin DOT org)