Fix MuxManager.Zones() comment

zones/muxmanager.go

@@ -62,8 +62,7 @@ func (mm *MuxManager) Run() {
 	}
 }
 
-// GetZones returns the list of currently active zones in the mux manager.
-// (todo: rename to Zones() when the Zones struct has been renamed to ZoneList)
+// Zones returns the list of currently active zones in the mux manager.
 func (mm *MuxManager) Zones() ZoneList {
 	return mm.zonelist
 }