Poul-Henning Kamp 4aa1a77d6f Allocate tty at attach time rather than open time.
Use the init/lock*in/out fields in struct tty and remove them from our softc.

Use tty->t_sc to find out softc when convenient.

Mostly OK'ed by:	bde
2004-09-16 19:46:23 +00:00
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