title: Can a custom NSURLProtocol intercept traffic from other apps if its running in the background?
body: <p>If an NSURLProtocol derived class registers to handle http, then if the app is running in the background (using didBeginBackgroundTaskWithExpirationHandler, or a voip/location background mode), then will it be aware of any http traffic from other apps?</p>
  
  <p>I presume not, but I'd like to confirm.</p>