missing AMQ usage in dummynet/ipfw man page for 12-alpha3

[Rodney W. Grimes]

> hi, I see the AMQ function is there but there is no usage info.
> And find this review marked accepted:
> Dummynet AQM usage documentation for ipfw man page  ?
> https://reviews.freebsd.org/D12507

That review is accepted by manpages, it has not been
reviewed outside of that, and is in my inbasket, but
not of extremly high priority.

It has not been commited to the tree.

-- 
Rod Grimes                                                 rgrimes at freebsd.org