freetype hack committed

[Egbert Eich]

I have committed the patch that allows linking of 
an externally supplied libfreetype.so into the 
freetype Xserver module. I still don't like that
the code requires an include file from the freetype
version shipped.
I would like to see this code being given widespread
testing on various platforms including various flavors
of BSD!

I'd also like to know which platforms by default
provide:

freetype
expat
zlib

so I can set the Has**** define to YES on these
platforms.

Egbert.