Implement more of the fontconfig API. Improve implementation, avoiding nonsyntactic macros and compiler warnings. Clean up some documentation. Guard against freeing NULL pointers returned from fonconfig.

#!/bin/sh
if
test -r $2
then
if
cmp $1 $2 > /dev/null
then
echo $2 is unchanged
rm -f $1
else
mv -f $1 $2
fi
else
mv -f $1 $2
fi