K 10
svn:author
V 6
adrian
K 8
svn:date
V 27
2016-05-16T23:40:32.606308Z
K 7
svn:log
V 431
[bhnd] Add logging macros to BHND.

There are 5 logging levels:

* ERROR
* WARN
* INFO
* DEBUG
* TRACE

There are 2 logging context:

* with
* without device

DEBUG and TRACE records are printed only if bootverbose.
Logging records are printed with source code line information if acceptable
logging level is DEBUG or TRACE.

Submitted by:	Michael Zhilin <mizhka@gmail.com>
Differential Revision:	https://reviews.freebsd.org/D6247

END