K 10
svn:author
V 5
markj
K 8
svn:date
V 27
2020-09-15T19:21:33.562418Z
K 7
svn:log
V 391
Update unix domain socket locking comments.

- Define a locking key for unpcb members.
- Rewrite some of the locking protocol description to make it less
  verbose and avoid referencing some subroutines which will be renamed.
- Reorder includes.

Reviewed by:	glebius, kevans, kib
Tested by:	pho
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D26294

END