wavelan bridging

[Theo de Raadt <deraadt@cvs.openbsd.org>]

In the past, many of you have asked if you can do wavelan bridging.
We kept saying no, because you cannot run the wavelan in AP mode.
There's no way to to put these cards into AP mode.

For prism II based cards, however, you now can.  Be sure to use a
very new firmware on the cards, though.

It should just work.

original work (on a GPL driver) by jkmaline@cc.hut.fi, then rewritten
to be BSD licensed by skibo@pacbell.net, then hacked into our tree by
mickey, millert, and markus who wrote the replacement WEP code (since
the BSD licensed code was from the USA).

pretty groovy stuff.  It'd be nice if some users tested this as a base
station.