advapi32: Add-some-flesh-to-LsaLookupNames2

[Louis. Lenders]

Hi, this is enough added to make several .net 2.0  apps and .net 3.0 installer  happy.
Patches based on patches from Aric that somehow never made it in, so i simplified it in the sense that only 1 name in the names array is handled for now. Next patch are some tests



      
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