title: How to cancel a persistent connection using NSURLConnection?
body: <p>Is it possible to destroy a persistent connection that has been created with NSURLConnection?  I need to be able to destroy the persistent connection and do another SSL handshake.</p>
  
  <p>As it is now, calling [conn cancel] leaves a persistent connection behind that gets used with the next connection request to that host, which I don't want to happen.</p>