K 10
svn:author
V 3
mav
K 8
svn:date
V 27
2017-03-21T09:12:41.750344Z
K 7
svn:log
V 245
Make CAM SIM lock optional.

For three years now CAM does not use SIM lock, but still enforces SIM to
use it.  Remove this requirement, allowing SIMs to have any locking they
prefer, if they pass no mutex to cam_sim_alloc().

MFC after:	2 weeks

END