osrg/ryu — pull request #11 by ederlf (2013-04-08 18:47:10+00:00)
Title: Add  special group identifier values defined on OpenFlow 1.3.1

This commit add group special values which were missing on OpenFlow 1.3 and were added in the 1.3.1 version.

It is useful to create a flow_mod message with an out_group with no group restrictions and for flow_stats messages.