ofproto: Send port status message for port-mods, right away.

Until now, when it processes OFPT_PORT_MOD message, Open vSwitch has waited
for ports to notify it that their status has changed before it sends a
port status update to controllers.

Also, Open vSwitch never sent port config updates at all for port
modifications other than OFPPC_PORT_DOWN.  I guess that this is a relic
from the era when there was only one controller, since presumably the
controller already knew that it changed the port configuration.  But in the
multi-controller world, it makes sense to send such port status updates,
and I couldn't quickly find anything in OF1.3 or OF1.4 that said they
shouldn't be sent.

EXT-338.
Signed-off-by: Ben Pfaff <blp@nicira.com>
Reported-by: Kmindg G <kmindg@gmail.com>

include/openflow/openflow-common.h

@@ -1,4 +1,4 @@
-/* Copyright (c) 2008, 2011, 2012, 2013 The Board of Trustees of The Leland Stanford
+/* Copyright (c) 2008, 2011, 2012, 2013, 2014 The Board of Trustees of The Leland Stanford
  * Junior University
  *
  * We are making the OpenFlow specification and associated documentation
@@ -32,7 +32,7 @@
  */
 
 /*
- * Copyright (c) 2008, 2009, 2010, 2011 Nicira, Inc.
+ * Copyright (c) 2008-2014 Nicira, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -76,6 +76,12 @@ enum ofp_version {
     OFP11_VERSION = 0x02,
     OFP12_VERSION = 0x03,
     OFP13_VERSION = 0x04
+
+    /* When we add real support for these versions, add them to the enum so
+     * that we get compiler warnings everywhere we might forget to provide
+     * support.  Until then, keep them as macros to avoid those warnings. */
+#define OFP14_VERSION 0x05
+#define OFP15_VERSION 0x06
 };
 
 /* Vendor (aka experimenter) IDs.