ARTheaders[] update

[Katsuhiro Kondou]

In article <20010506145529.A2652 at wonderland.linux.it>,
	"Marco d'Itri" <md at linux.it> wrote;

} Please add User-Agent and X-Original-Message-ID to the list of headers
} passed to the perl filter. (Maybe X-Reposted-By too?)

Added except for X-Reposted-By which I'm not sure if widely used.

} (Should Also-Control be moved from HTstd to HTobs?)

Moved, though this change has nothing to do with header parsing.
-- 
Katsuhiro Kondou