[Fontconfig] Streamlining fontconfig scanning

[Keith Packard]

Behdad Esfahbod <behdad at behdad.org> writes:

> Anyway, we need to reach a rough consensus on which direction to go with
> this.  While the checks above sound smart, I have a hunch that keeping it
> simple results in less headache in the long term.

I suspect just disabling the blank checks would be sufficient;
applications wanting 'some' font to display a particular glyph are
probably better served by using 'sans' and expecting that the
environment will have already set that up to point to a set of fonts
which cover much of the code point space.

Anything more complicated will be harder to explain when it fails.

-- 
-keith
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