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The TSO/LRO section needs a little updating.

According to find sys/dev | xargs grep -l IFCAP_TSO, TSO is present in
at least:   bce, cxgb, em, ixgbe, msk, mxge, nfe, nxge, re

Based on grepping for IFCAP_LRO, LRO is currently available only in mxge.

Note that the LRO in mxge is currently a driver specific hack (I wrote
it, so I can say it :), intended to tide us over until Andre finishes
his more extensive LRO infastructure.  Further, LRO is currently done
in software.  Jack Vogel was looking at porting the mxge LRO into
something that could be used by several 10GbE drivers; I'm not sure
what happened to that.

Drew