First attempt at o11s on ath5k

[stevie.glass]

Thanks to Andrey and Javier for answering so quickly.

I am getting beacons from the one interface and  the other is not
generating beacons - presumably its staying silent because its
successfully received the beacon from the other station. There are quite
a lot of re-transmissions but not so many as to be hugely worrying. The
"silent" station never replies to the peer mesh link actions. I've set
up a monitor mode device on the receive end there and the action frames
are being received.

Shall take a closer look this evening and will welcome any pointers as
to possible causes.

Steve