Integration of Anyfi.net software.

Anyfi.net is a software extension for Wi-Fi access points that makes every
network available through every access point. See http://anyfi.net for more
information.
Added airtime driver support for mac80211/ath9k.

Anyfi.net software gives priority to traffic generated by the owner of the
access point, taking both the WAN connection bandwidth and available radio
spectrum into account (see http://anyfi.net/documentation#a_prioritization). But
to be able to do that it of course needs access to information about how the
radio is spending its time. This patch adds airtime estimates to the information
reported by the mac80211/ath9k Wi-Fi driver through radiotap.

Anyfi.net will work without this patch, but spectrum aware prioritization
and throttling will be disabled.
Configuration interface for Anyfi.net on residential gateways.

To make configuration as simple as possible for the end-subscriber there is only
a single checkbox controlling the 'anyfi_disabled' property on both the radio
frontend and the tunnel termination backend side. This allows for configuration
of 'anyfi_server' by the service provider, e.g. using TR-069 or similar, and
a controlled roll-out with "opt-out".

Also note that we do not reveal the "Anyfi.net" brand name to the end-
subscriber; Internet service providers typically want to deploy Anyfi.net
technology with custom mobility control servers under a more generic name, or
even under their own brand names.

See http://anyfi.net/documentation#i_rgi for more information.
Configuration interface for Anyfi.net on consumer Wi-Fi routers.

The recommended integration for consumer Wi-Fi routers is very similar to that
of a residential gateway, except that we explicitly refer to "Anyfi.net". The
end-user can change the 'anyfi_disabled' property on both radio frontend and
tunnel termination backend, with a single checkbox. The 'anyfi_server' property
is left under the control of the vendor, or more advanced users/administrators
with shell access. See http://anyfi.net/documentation#i_routeri for more
information.
Configuration interface for Anyfi.net on access points.

Public and corporate access points are typically configured by IT professionals
and will more often than not be used in combination with custom mobility control
servers, e.g. for carrier Wi-Fi applications. This configuration interface
therefore includes controls for most properties and exposes the user to the full
nomenclature of Anyfi.net technology. For more information see
http://anyfi.net/documentation#i_api.
Configuration interface for Anyfi.net on network appliances.

Anyfi.net is often used to provide remote access to an existing Wi-Fi network.
But sometimes you want to distribute a virtual Wi-Fi network through Anyfi.net
even though that network has no local representation; a typical example is a
tunnel termination gateway that terminates many secure Wi-Fi over IP tunnels,
coming in from residential gateways and access points. This command line
configuration interface can be used to setup such virtual networks.

For more information on how to configure WPA/WPA2 Enterprise (all EAP
authentication protocols are supported including EAP-SIM/AKA) please see
http://wiki.openwrt.org/doc/uci/wireless#wpa.enterprise.access.point.

For more information on the recommended Anyfi.net configuration interface for
network appliances and tunnel termination gateways please see
http://anyfi.net/documentation#i_ttgi.