I'm having a devil of a time figuring out why there are still subscriptions

lying around when the client reconnects.  Let's try just clearing them out
again on resumption.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@6619 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/main/java/com/threerings/presents/server/PresentsSession.java

@@ -550,6 +550,9 @@ public class PresentsSession
             return;
         }
 
+        // make extra sure we have no lingering subscriptions
+        clearSubscrips(false);
+
         // Update our client secret with the new auth request
         _clobj.getLocal(ClientLocal.class).secret = getSecret();