use the printf routines in subr_prf instead of rolling out own

pass flags to l_close, dont ttywait if IO_NDELAY (revoke)

new copyright; att/bsd/shared

redo partab using #defines; meta chars are normal; simpler flushes;
fix up comments

move ttyprintf to subr_prf.c

rm user.h, reg.h; move ttspeedtab back for drivers;
change "running" to "iowait" for sleeping procs without wmesg;
(marc) add TIOCDRAIN ioctl

more-or-less working with new proc & user structs

update for new VM

checked in for Marc to create checkpoint for VM merge

(by karels) typo in TIOCSETAF, was always flushing; can't use 0 for no pgrp;
ttyrub newline could maybe happen???

reformat EXTPROC code

ttysleep - to catch revoked terminal

VINFO -> VSTATUS

add OTIOCCONS

VFLUSHO -> VDISCARD

check for revoked line

pgsignal takes extra arg. telnet linemode changes (dab@cray).

update from Mike Hibler at Utah

abolish NOHANG flag. signal session leader on lost carrier (not fgpgrp), put CLOCAL check on carrier transitions

vinfo under control of ICANON, extra checks in TIOCCONS

lflag can change while we sleep in ttread.

change wchan messages to consistant format

^T

tsleep; unwind on interrupt; don't back up uio then copyin again
after blocking; KNF; strings for sleep messages; SIGINFO; NOKERNINFO lflag
allow input to be read from queue after carrier drops

check for compat ioctls. pgrp can now be null.