(part from william) clean up the #ifdefs in main (slightly),
use howto from args if present on any machine, default to 0

ignore SIGTSTP, HUP in rc; open console for writing, too!; more cleanup

fix shutdown bug in last delta; revoke console so single() doesn't fail;
attempt some cleanup of #ifdef mess

add hp300 support from Utah

checked in for marc by mckusick

add pathnames.h

use constants in utmp.h

use logwtmp()

use library version of rmut

declare merge() externally; ANSI C fix

trivial speedup

check for null pointers; bug report 4.3BSD/etc/35

tahoe's first register variable is r12

consistency, use SIGTERM once then SIGKILL's, uniform logging (once)

facilities in syslog

lengthen space for getty/window commands (70->200)

Dynamically allocate structures instead of fixed size array
(from ks@purdue-ecn)

unblock signals before fork, window mgr changes from jg

add copyright

changes to exec a command from /etc/ttys besides getty, let getty open tty.

after logout give port selectors an opportunity to detect DTR
transition; also after proper login reset error detection code; from brl

uses new getttyent(3) routines.

ostensibly make it work with new signals; lots of reformatting done as well

utmp changed format

sun boot arg flags