moving some 802.11 code into lib80211

[Rui Paulo]

On Thu, 2015-11-26 at 14:57 -0800, Adrian Chadd wrote:
> hiya,
> 
> I've started migrating net80211 specific bits out of ifconfig into a
> library.
> 
> https://reviews.freebsd.org/D4290
> 
> I'd like to commit this initial step in a couple of days so I can
> easily add more to things.
> 
> I'd love feedback. ;)
> 

That looks useful.  A quick look at the API and I didn't see anything
wrong with it...

-- 
Rui Paulo