MCS field: RFA

Hi,
the MCS filed is in the suggested fields since about a month, now I
request its approval.

Here is the draft of the field: http://www.radiotap.org/suggested-fields/MCS

and here there are patches for the radiotap parser, mac80211, tcpdump
and wireshark:

http://teknoraver.net/software/radiotap_mcs/

Before it's approved I would ask the crew what is the best thing to do
with the old rate field
when the MCS one is set.
We can leave it set with a value of 0 or just omitting it when the MCS is set.
The latter makes more sense to me.

Cheers,
Matteo Croce