Hi folks...

I have just improved the support for software powerdown in the NetBSD
kernel somewhat.  Previously, if you had APM on an i386, RB_HALT would
cause the machine to power down.  These semantics are undesirable on
systems which support software powerdown _and_ have a Real console monitor
(e.g. Sun4m, Digital Personal Workstation, etc.).

Now, to power down, RB_POWERDOWN must be specified.  RB_POWERDOWN implies
RB_HALT, so if the platform does not support software powerdown, or if the
powerdown fails, the system will simply halt.

A -p option has been added to both halt(8) and shutdown(8) to specifiy
that software powerdown is to be performed.

Affected systems:

	- alpha: Digital Personal Workstation (Miata) can now software
	  powerdown.

	- i386: Systems w/ APM (mostly laptops) will no longer powerdown
	  on halt unless -p is specified to halt(8) or shutdown(8).

	- sparc: Sun4m systems which support software powerdown can
	  now do so.

If you have any problems, please send a bug report w/ send-pr(1).

Enjoy!

Jason R. Thorpe                                       thorpej@nas.nasa.gov
NASA Ames Research Center                            Home: +1 408 866 1912
NAS: M/S 258-5                                       Work: +1 650 604 0935
Moffett Field, CA 94035                             Pager: +1 650 428 6939