[Exim] where is config.samples directory?

The http://www.exim.org/FAQ.html webpage says:

Each sample configuration is held in a separate file in the
config.samples directory. Those with names of the form Cnnn are Exim
configurations; those with names of the form Fnnn are filter file
fragments.

Where is this "config.samples directory"?

I already know about tarball and have used it. But this paragragh seems to
indicate that some directory is available that users can find individual
files. I don't see the "directory" via ftp site. I think it would be
useful if config.samples individual files were also available (in addition
to tarfile) via ftp.

  Jeremy C. Reed
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