new NXAST_RESUBMIT_TABLE action can look up in additional
tables. Tables 128 and above are reserved for use by the
switch itself; please use only tables 0 through 127.
+ - Add support for 802.1D spanning tree (STP).
- Fragment handling extensions:
- New OFPC_FRAG_NX_MATCH fragment handling mode, in which L4
fields are made available for matching in fragments with