K 10
svn:author
V 3
mjg
K 8
svn:date
V 27
2020-11-09T23:04:30.517764Z
K 7
svn:log
V 279
threads: introduce a limit for total number

The intent is to replace the current id allocation method and a known upper
bound will be useful.

Reviewed by:	kib (previous version), markj (previous version)
Tested by:	pho
Differential Revision:	https://reviews.freebsd.org/D27100

END