wined3d: Defaults and overrides for driver and description (bug #15839)

[John Whitlock]

wined3d: Defaults and overrides for driver and description

Use the OpenGL renderer for the default adapter description and the OpenGL 
vendor to create the default adapter driver.  Allow overriding both from 
registry values.

This fixes bug 15839.

The first patch should be credited to Mirek Slugeň (thunder.m at email.cz)
The next two are from John Whitlock (John-Whitlock at ieee.org)
If only one author is allowed, please use Mirek Slugen.
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