title: Determine if SKPaymentTransaction is an auto-renewable transaction
body: <p>I'm implementing auto-renewable subscriptions, where the IAP receipt is being sent up to our server and then validated with Apple's servers (server to server). </p>
  
  <p>I noticed that the auto-renew transactions are still getting added to my devices <code>SKPaymentQueue</code>. However I already sent up the receipt data to my server, so I want to skip over these transactions since my server is polling/getting callbacks from Apple's to manage the users subscription status. Is there a way to do that?</p>
  
  <p>Or should I not be skipping these transactions and sending up the receipt data every time I get a new transaction in the queue, even if its just the auto-renew.</p>