Remove some unused variables.

Found with:	Clang Static Analyzer
MFC after:	2 weeks
Fix spelling mistake in comment.

Spotted during:	http://www.bsdcan.org/2014/schedule/events/484.en.html
Adding userboot changes
Userspace kload cmd  -- based on bhvload
New files for kload.

Main bulk of the kload logic
Hook up kload to the build
hookup kload to the kernel
add apic debug code