K 10
svn:author
V 3
mjg
K 8
svn:date
V 27
2020-11-10T18:10:50.769728Z
K 7
svn:log
V 504
Allow rtprio_thread to operate on threads of any process

This in particular unbreaks rtkit.

The limitation was a leftover of previous state, to quote a
comment:

/*
 * Though lwpid is unique, only current process is supported
 * since there is no efficient way to look up a LWP yet.
 */

Long since then a global tid hash was introduced to remedy
the problem.

Permission checks still apply.

Submitted by:	greg_unrelenting.technology (Greg V)
Differential Revision:	https://reviews.freebsd.org/D27158

END