halt with powerdown

["Michele 'mydecay' Marchetto" <mydecay_(_at_)_openbeer_(_dot_)_it>]

hi all,
if I set POWERDOWN=YES on /etc/rc.shutdown and halt the system it
doesn't poweroff.

This patch should fix :)

thanks and bye

[demime 1.01d removed an attachment of type text/x-patch which had a name of reboot.diff]