initialize part earlier in case of debugging.
Convert sparc console code from rcons and pseudo-devices to rasops and wscons.
For most framebuffers it is faster.

Other changes include:
o 24 bit support in tcx(4) for the S24 framebuffer
o accelerated cgsix(4) text console
o new cgtwelve(4) driver for the GS framebuffer
o improved serial driver code
o better keyboard support

The following framebuffers have not been tested but should work: cgfour,
cgeight and cgfourteen

These changes will require XF4 changes, to use Xwsfb instead of Xsun*, to be
commited later today.

Most of the work by me during the LSM and the week after, with code borrowed
from jason@, NetBSD (new serial code), and feedback from mickey@. Work on
pnozz(4) done by millert@
MAKEDEV and /etc/* changes for wscons on sparc
Regen
make ssh-agent setgid, disallow ptrace.
Enable wscons code on sparc, and let kbd_sparc.c die
Build the wscons utilities on sparc, too
screenblank is replaced by the wscons built-in burner facility on sparc
Build the wscons utilities on sparc too
Manual pages update to reflect the sparc wscons changes.
Sync hardware list with the current state of the code.
Missing FRELE() call on writev(2) error condition; art@ ok.
Update rom cursor position if we're the console framebuffer
Neuter the machdep.vsyncblank sysctl, as this setting is now controlled
by wsconsctl.
ok art@
Remove a large chunk of `#ifdef notyet' code
Use state tree instead of separate (flat) list to find NAT proxy ports,
allows to use the same proxy port with different external peers.
From Ryan McBride
more PermitUserEnvironment; ok markus@
Catch null pointer deref (segfault), from wilfried@
missing period
Remove some unused prototypes, KNF.