[ofw] Windows IB APIs

[Hefty, Sean]

> I'll make a stronger statement here - if interop between Windows (via
> Network Direct) and Linux (via verbs/rdmacm) does not work, then there is a
> driver bug somewhere.  You should be able to establish connections between
> a Windows Network Direct application and a Linux verbs/rdmacm application.

If ND does not mandate a specific wire protocol, then interoperability is left to the implementation of the provider.