MFC - tracking commit.
MFC - tracking commit.
More code examination and fixes. This pass was to mainly to attack "XXX: FIX!!" instances.

* Biggest bit of work was to add rate-adaptive live entropy support to the high-rate "live" sources. The current code is there to exercise to process, and will be frobbed later. (Damn. I forgot to put in a "XXX: " Comment).

* Clean up comments where issues are noticed.

* Move code around a bit to be in more logical places (dummy random_read(9) is now in dummy_rng.c).