K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2016-02-08T10:54:27.888250Z
K 7
svn:log
V 496
Remove the assert which outlived its usefulness, and, by default,
disable compilation of the code which made it possible to call
stop_all_proc() from usermode at all.

Move the comment to the preamble of stop_all_proc() and reword it to
give overview of the function intent.

proc0 has P_HADTHREADS flag set due to kthread_add(), but no
P_KTHREAD, which triggered the assert, which does not serve a purpose
now.

Reported by:	Oliver Pinter
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks

END