Update head/ to -ALPHA1 status, as part of the 10.0-RELEASE
cycle.

Approved by:	re (implicit)
Sponsored by:	The FreeBSD Foundation
Fix the type of the idtype argument to wait6() in syscalls.master.

Approved by:	re (kib)
MFC after:	1 week
Fix the type of the idtype argument to wait6() in syscalls.master.

(Accidentally missed this in the previous commit)

Approved by:	re (kib)
MFC after:	1 week
Regen.

Approved by:	re (kib)
- Decode the idtype argument passed to wait6() in kdump and truss.
- Don't treat an options argument of 0 to wait4() as an error in
  kdump.
- Decode the wait options passed to wait4() and wait6() in truss
  and decode the returned rusage and exit status.

Approved by:	re (kib)
MFC after:	1 week