Log Message:
Update to 2.4.0:

Fontconfig version 2.4 is API and ABI compatible with the 2.3
release, although some significant internal restructuring has
occurred.

Major changes from the 2.3 series:

* Shared mmap'ed cache files. All font cache files are mapped
  read-only and shared across multiple processes. Startup
  performance and memory footprint of the library have, as a
  result, been significantly improved.

* Configuration split into multiple files. While 2.3 provided
  the ability to incorporate additional configuration files from
  a directory, it didn't use them extensively. The new configuration
  structure places most of the configuration into separate files
  and provides conventions for naming them that are designed to
  permit user and distribution customization of the library
  without needing to edit the master config file.

* Eliminate internal symbols from shared library symbol table.
  The shared library now exports precisely the list of symbols
  present in the public header files. Use of private symbols,
  always unsupported, will now result in failure to link and run.

Thanks to all who have made this release possible, especially
Patrick Lam who built the shared cache file code and performed most
of the maintenance over the last year.

Keith Packard 2006-9-9