get it in, deraadt@

ok deraadt@, marco@

please commit from deraadt@

bsd.rd does not overlap the boot code... this problem is starting to
feel familiar.. tested by myself and claudio

prompted by/ok dlg@ deraadt@

grudgingly ok deraadt@

sparc.
ok miod@

pave the way for future work; ok since this does not change the generated
MAKEDEV

with a specific manpage reference.

limited to power change events and battery status retrieval.
ok deraadt@ mickey@

to the appropriate sections. No functional change, except for the manpage
being nicer.

same rules to both wskbd0:wskbd and wsmouse0:wsmouse; miod ok

ok deraadt@