title: Socket.IO on iOS breaks when Safari is backgrounded
body: <p>I've got a mobile web app that uses Socket.IO for WebSocket support and it works great except when I press the home button and then come back to Safari. If I background Safari by going to a different app and then come back to it the WebSocket connection doesn't work anymore. </p>
  
  <p>Of note: going to a different tab in Safari and then coming back does not break the WebSocket -- I have to actually leave the Safari app.</p>
  
  <p>Not get any errors on my web console when trying to send messages through the socket, it just doesn't work. Any ideas?</p>