+ * OpenFlow 1.4+ OFPT_TABLE_STATUS is now supported.
+ * New property-based packet-in message format NXT_PACKET_IN2 with support
+ for arbitrary user-provided data and for serializing flow table
+ traversal into a continuation for later resumption.
+ * New extension message NXT_SET_ASYNC_CONFIG2 to allow OpenFlow 1.4-like
+ control over asynchronous messages in earlier versions of OpenFlow.
+ * OpenFlow 1.3 Extension 230, adding OpenFlow Bundles support, is
+ now implemented. Only flow mod and port mod messages are supported
+ in bundles.
+ * New OpenFlow extension NXM_NX_MPLS_TTL to provide access to MPLS TTL.