[Fontconfig] FcConfigNormalizeFontDir considered harmful

[Keith Packard]

In looking at this code, it's reading every directory in the font
hierarchy and stat'ing every file. That's a lot of what the font caches
are supposed to avoid; all of those syscalls at application startup.

I'm trying to figure out what we're attempting here; the old cache code
would already infinite loop if the font directories had circular
symlinks, so this isn't necessary from a robustness perspective.

If the only thing the code is for is to eliminate duplicate caches for
the same directory reached by multiple paths, then I don't think that's
necessary either; again, the old code would have loaded the caches twice
in that case.

I think we can just eliminate the path normalization entirely.
Arguments?

-- 
keith.packard at intel.com
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