[PATCH] iphlpapi: Implement if_nametoindex.

[Stefan Dösinger]

> Am 24.05.2017 um 14:26 schrieb Hans Leidekker <hans at codeweavers.com>:
> 
> Why not call ConvertInterfaceNameToLuidA and then ConvertInterfaceLuidToIndex?
Hmm, I think I see what you mean now. WGC passes a string like "{00000001-0000-0000-0000-000000000000}“ to if_nametoindex, which I suspect is not what the POSIX function with the same name expects. I think this warrants some tests.