Release v2.2.17 (#4272)

Author: limingxinleo

class_map/ThriftUdpTransport.php

@@ -40,7 +40,7 @@ class ThriftUdpTransport extends TTransport
     private $logger;
 
     /**
-     * @var null|\Socket|resource
+     * @var null|resource|\Socket
      */
     private $socket;