K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2015-01-19T17:36:52.295519Z
K 7
svn:log
V 332
Stop enforcing additional reference on all cdevs, which was introduced
in r277199.  Acquire the neccessary reference in delist_dev_locked()
and inform destroy_devl() about it using CDP_UNREF_DTR flag.

Fix some style nits, add asserts.

Discussed with:	hselasky
Tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week

END