winecfg: add all Windows versions and accompanying error message (try 4)

[Jason Overland]

This patch supersedes "winecfg: add all Windows versions and accompanying error message (try 3)".

Changes since try 3:

A function only used in a 64 bit #ifdef is now itself guarded by an #ifdef, so no more compiler warning under 32 bit.

Error message shortened to refer to the Wine FAQ, but not the specific section as those may change in the future.
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