K 10
svn:author
V 3
cem
K 8
svn:date
V 27
2019-11-22T20:20:37.526178Z
K 7
svn:log
V 400
random(4): Abstract loader entropy injection

Break random_harvestq_prime up into some logical subroutines.  The goal
is that it becomes easier to add other early entropy sources.

While here, drop pre-12.0 compatibility logic.  loader default configuration
should preload the file as expeced since 12.0.

Approved by:	csprng(delphij, markm)
Differential Revision:	https://reviews.freebsd.org/D22482

END