K 10
svn:author
V 3
avg
K 8
svn:date
V 27
2019-08-29T07:51:11.542530Z
K 7
svn:log
V 202
scsi_cd: make the media check asynchronous

This makes the media check process asynchronous, so we no longer block
in cdstrategy() to check for media.

PR:		219857
Obtained from:	ken
MFC after:	3 weeks

END