Explicitly require Security Officer's approval for kernel PRNG bits.

Note that there is ongoing discussion about approval requirement
for userland PRNG bits.

Reviewed by:	so (des)
Approved by:	core (jhb)
Approved by:	re (gjb)
Improve iSCSI address resolution, fixing "InitiatorAddress" handling,
and error reporting.

Approved by:	re (kib)