[Fontconfig] mmaping FcInit

[Keith Packard]

Around 6 o'clock on Mar 26, Owen Taylor wrote:

> Changing things so that a static FcPattern was only one memory block
> would be easier, though if you don't reference count static patterns,
> you may have trouble with font database changes,

Static FcPatterns are already allocated completely differently than 
dynamic ones, they remain compatible at the data structure level.  This 
allows them to share lots of pieces across patterns saving huge amounts of 
memory.

-keith


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