[TEST/REVIEW/HEADSUP] tty drivers mega-patch

[Poul-Henning Kamp]

http://phk.freebsd.dk/patch/tty.patch

This patch removes 2500 lines of copy&paste insanity in tty drivers
and generally tries to get things to be less confused & confusing.

I need testers for all the different kinds of serial hardware we support.

Please help test!

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.