MFC of TOE support to RELENG_7

[Kip Macy]

>  I apologize for not yet reviewing all the code.  I take that last bit
>  to mean the drivers can reach up into sockets given those functions?
>  I gather this is due to the work necessary to implement RDMA over TCP?
>

TOE for obvious reasons uses the existing socket infrastructure for
integrating in to the stack. The iwarp module uses the services of the
TCP offload module to establish and tear down TCP connections.

         -Kip