In NXAGENT_SERVER we can also fully rely on libXfont
 for handling fpe internals.

 Backported from X.org:

 commit 75536ee80595c79bba95a1fb6844126ee08486d4
 Author: Tiago Vignatti <tiago.vignatti@nokia.com>
 Date:   Wed Jun 23 15:18:03 2010 +0300

    dix: use one single function to register fpe fonts

    X server doesn't need to understand fpe internals, so use
    register_fpe_functions from libXfont.

    It's required to get new version of libXfont, therefore adjust it to be passed
    to autoconf.
Signed-off-by: Tiago Vignatti <tiago.vignatti@nokia.com>
Reviewed-by: Mikhail Gusarov <dottedmag@dottedmag.net>
Reviewed-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>