K 10
svn:author
V 3
cem
K 8
svn:date
V 27
2016-09-08T21:20:01.492735Z
K 7
svn:log
V 334
queue(3): Enhance queue debugging macros

Split the QUEUE_MACRO_DEBUG into QUEUE_MACRO_DEBUG_TRACE and
QUEUE_MACRO_DEBUG_TRASH.

Add the debug macrso QMD_IS_TRASHED() and QMD_SLIST_CHECK_PREVPTR().

Document these in queue.3.

Reviewed by:	emaste
Sponsored by:	Dell EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D3984

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