title: setting up iPhone P2P only over bluetooth and without GKPeerPickerController
body: <p>I want to use a custom interface to connect with other iDevices in a p2p game. I know I can either use <code>GKSession</code> and <code>GKSessionDelegate</code> or use the lower level Bonjour browsing. But both of them will search for devices both over bluetooth AND wifi.</p>
  
  <p>I want to list only bluetooth devices. I know this was answered in the past as impossible, but the Flight Control app seems to be able to do it.</p>