The following patch implements a "poweroff" command which is equivalent to
"halt -p", but allows powering down the system from an exec(2) call, e.g.
via a user which has "poweroff" as login shell. The command name is
modeled after Solaris.

The patch can be found at http://www.feyrer.de/Misc/poweroff.patch .

Please let me know if you have any objections, else I'll commit this
somewhen next week. Thanks!


 - Hubert

-- 
Microsoft: "Where do you want to go today?"
Linux:     "Where do you want to be tomorrow?"
BSD:       "Are you guys coming, or what?"