vnode interface conversion

sigstack becomes COMPAT; sigaltstack becomes real

add cpu_coredump for machine dependent coredump state

SunOS compatibility

no longer pass proc to vn_open (now in ndp)

must init proc pointer

have to check NFS lease when writing core image

fix up comment

purge seg.h

add printf if signal ignored in system process.

dump core as core.progname (no pid)

can't kill zombies even by killpg

use vn_close rather than vrele after vn_open

dump core as core.progname.pid rather than just as core

vn_open now returns locked, so must unlock when done

u. is gone, pcb is at p_addr; aston => signotify

add proc pointers to appropriate VOP and vnode operations

(in last delta:) use array of signal property flags rather than
wired-in signal names; noproc is history; move fatal signal code to sigexit,
so trap can call directly; rm 386 hacks (save frame type i

(in last delta:) use array of signal property flags rather than
wired-in signal names; noproc is history; move fatal signal code to sigexit,
so trap can call directly; rm 386 hacks (save frame type in pcb); fake up
core dump with kinfo_proc

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

386 trap and syscall frame difference passed thru to sendsig()

update for new VM

tty stop signals shouldn't stop sleeping procs in orphaned pgrps

new copyright notice

RETURN => return, remove syscontext.h

expunge p_cursig, using p_xstat instead for stop signals;
expunge u_code