K 10
svn:author
V 4
ngie
K 8
svn:date
V 27
2017-03-20T18:28:22.538049Z
K 7
svn:log
V 292
Handle kd == NULL gracefully with kvm_close(3)

Don't segfault in kvm_close(3) if provided a NULL pointer. Instead, return
-1 and set errno to EINVAL.

Document this new behavior explicitly.

MFC after:	1 week
Reviewed by:	vangyzen
Sponsored by:	Dell EMC Isilon
Differential Revision:	D10065

END