tty code, status and future...

[Poul-Henning Kamp]

I'm done hashing tty code for now and I'll take a break away from
it for some time.

Apart from the 3000 lines less copy&paste code we are now able to
safely remove a serial port which is being used (not all drivers
support this yet though).

A number of drivers still need some minor polishing mostly related
to how tty structures are allocated and managed.

The next logical step is to sort out the tty <-> linedisc stuff and
decide where snoop(4) fits into the bigger picture.

When that is sorted out, we can try to remove Giant.

But as I said: I'm taking a break for now, I'll be hacking bufcache
instead.

-- 
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.