K 10
svn:author
V 5
sephe
K 8
svn:date
V 27
2016-10-31T04:54:15.109883Z
K 7
svn:log
V 293
hyperv/hn: Cleanup RXBUF ack processing.

- Increase the # of retries.
- Add comment.
- Log error, if RXBUF ack fails.
- Add stat for RXBUF ack failures.

RXBUF ack really should _not_ fail...

MFC after:	1 week
Sponsored by:	Microsoft
Differential Revision:	https://reviews.freebsd.org/D8368

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