[ofw] udapl for windows

[Sean Hefty]

>What is being done is that IPOIB looks at all the ARP replies and
>updates it's tables accordingly. So, IPOIB does know where the remote
>addresses are if windows knows them.

This should work if ARP was actually used for the address translation.  Does
Windows support manual updates to the route tables?

>Please note that all the caching issues are minor to my understanding as
>each component can hold it's own cache of the arp/ATS results and get
>the results very quickly.

This ends up implementing multiple caches, each with their own policy.  IMO, it
would be easier for a user to control caching policy in one place.

- Sean