K 10
svn:author
V 6
kevans
K 8
svn:date
V 27
2019-10-02T02:37:34.699095Z
K 7
svn:log
V 411
shm_open2(2): completely unbreak

kern_shm_open2(), since conception, completely fails to pass the mode along
to kern_shm_open(). This breaks most uses of it.

Add tests alongside this that actually check the mode of the returned
files.

PR:		240934 [pulseaudio breakage]
Reported by:	ler, Andrew Gierth [postgres breakage]
Diagnosed by:	Andrew Gierth (great catch)
Tested by:	ler, tmunro
Pointy hat to:	kevans

END