Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

correct copyright attribution; there was no copyright in the patches
from Andrea so I assigned him ownership; this corrects that

Submitted by: Andrea Bittau <a.bittau@cs.ucl.ac.uk>

Due to the recent "aircrack-ptw" WEP cracking discovery, I thought
that it might be worth fixing a couple of bugs in wesside and making
it use the new cracking technique. I think this enhancement makes
the tool quite usable. It is possible to recover keys in only a
couple of minutes.

* Fix ACKs. Firmware will ACK data [just set the MAC addr correctly].
* Fix RX routines. Process all packets read().
* Use aircrack-ptw [built-in] rather than external aircrack.
* Log data in pcap format so that it may be used by others [e.g. aircrack-ng].

Submitted by: Andrea Bittau <a.bittau@cs.ucl.ac.uk>