- Add a test for bug 191427 where pw(8) will go into an infinite loop

Reviewed by:	will
MFC after:	1 month
Separate option handling from SIOC[SG]LAGG to SIOC[SG]LAGGOPTS for
backward compatibility with old ifconfig(8).
Remove obsolete Makefile for acpi.ko.
Revert r272390.

Pointed out by:	glebius