Windows 10 SDK detection broken with new SDK

[retep998]

The new Windows 10 SDK changed some registry values slightly which broke the current Windows 10 SDK detection code.

This results in the linker error note: LINK : fatal error LNK1181: cannot open input file 'ws2_32.lib'

I am working on a PR to fix this completely overhaul the code for the better.

In the meantime you can work around this issue by manually invoking vcvars as done here.

[retep998]

Alas, because this isn't a regression, even when my PR does land, this issue will continue to plague people until it proliferates into stable.