/usr/share/doc/cfengine2/examples/cfagent.conf-advanced.example is in cfengine2 2.2.10-5build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# 
#  cfagent.conf
#
#  This file is for root only.
#
##############################################
###
#
# BEGIN cfengine.conf (Only hard classes in this file )
#
###
import:
   #
   # Split things up to keep things tidy
   #
   any::            
                    cf.groups
                    cf.main
   any.!matrix::
                    cf.site
                    cf.services
                    cf.motd
                    cf.printer
                    cf.www
                    cf.mail
   hpux::           cf.hpux
   debian.!matrix:: cf.debian
   redhat::         cf.redhat
   SuSE::           cf.suse
   solaris::        cf.solaris
   sun4::           cf.sun4
   ultrix::         cf.ultrix
   freebsd::        cf.freebsd
   nexus|dax|cube|pax:: cf.users
   matrix::         cf.matrix
###
#
# END cfengine.conf
#
###
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