- Update mxge to use if_transmit(), and the new buf_ring
interfaces, so as to enable multiple transmit queues.
Use of if_transmit() is conditional on IFNET_BUF_RING,
and is enabled by default (as in if_em).
- Record a flow id on receive if receive hashing is active.
I currently only record the rx ring id (0..8) rather than
the 32-bit topelitz hash result, as doing the latter would
require shifting the driver to use a larger rx return ring.
Sponsored by: Myricom, Inc.
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