title: WebAuthenticationBroker in WinJS not accepting token longer than 2k length
body: <p>We are trying to use WebAuthenticationBroker in a WinJS app using ACS as the provider.</p>
  
  <p>The problem is our SWT token is a little large, it seems longer than 2K and therefore exceeds max length for a URI.
  Can anyone tell me is there a way to return large tokens to WebAuthenticationBroker ?</p>