#ifdef out old cache stuff, replace with first version of new mmapping
cache. Add *Read and *Write procedures which mmap in and write out the fontconfig data structures to disk. Currently, create cache in /tmp, with different sections for each architecture (as returned by uname's .machine field. Run the fc-cache binary to create a new cache file; fontconfig then uses this cache file on subsequent runs, saving lots of memory. Also fixes a few bugs and leaks.