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things than record a single value. o add a per-node method for returning the "current RSSI" for a node o create a default method that returns ni_rssi which is the rssi for the last received frame o use the per-node "get rssi" method to return data for the RID's submitted by wicontrol, et. al. Loosely based on work by Tom Marshall <tommy@home.tig-grr.com> for MADWIFI.