[ofa-general] same port (SID) listeners

[Sean Hefty]

> I noted that I can open two rdma-cm based listeners (*) on the same IB port
> each on a different partition using the same tcp port, and it works fine.
> 
> As they both translate to the same IB SID, is there some matching
> logic in the rdma-cm level?

There's additional matching in the IB CM against the private data, where 
the IP addresses are carried.

- Sean