[rbridge] Consensus Check: Point to Point links

[Eastlake III Donald-LDE008]

This is a check via the mailing list to confirm or refute an apparent
consensus from the minutes of the Chicago meeting for a change from
protocol draft -05:

   If it is known that a link is a point to point link between two
   RBridges, then the outer header, if it is an Ethernet header, can
   have any source and/or destination addresses, those addresses will
   be ignored on receipt, and the outer VLAN tag can be omitted.

If no particular controversy arises over this in the next two weeks, we
will declare it to be the working group consensus.

Thanks,
Donald & Erik