Internal Program Version: libXfont2  2.0.6

libXfont provides the core of the legacy X11 font system, handling
the index files (fonts.dir, fonts.alias, fonts.scale), the various
font file formats, and rasterizing them. It is used by the X servers,
the X Font Server (xfs), and some font utilities (bdftopcf for
instance), but should not be used by normal X11 clients. X11 clients
access fonts via either the new APIs in libXft, or the legacy APIs in
libX11.

http://xorg.freedesktop.org