For the transition from inetd to xinetd, xinetd should probably create a
dummy /etc/inetd.conf which tells people to use xinetd instead, just to
ease the transition.  I'm thinking of something like:

#
#
#  WARNING:  As of Red Hat 7.0, xinetd is used instead of inetd
#
#  this file is now obsolete, and entries for services instead belong
#   in /etc/xinetd.conf
#  look at the entries there for examples of how to use xinetd, and
#   consult the xinetd (1), xinetd.conf (1), and xinetd.log (1) man pages
#   for more information
#
#  there's also a brief, non-RH-specific tutorial available at
#   <http://www.macsecurity.org/resources/xinetd/tutorial.shtml>
#   as well as a FAQ and other information at
#   <http://www.xinetd.org/>
#
#
#  HTH
#