The source code for XRN includes a man page, which is built when xrn is built and installed when "make install.man" is run. This man page is not included in the xrn RPM. It should be. Do you allow third-party software authors to maintain the official RedHat RPMs for their packages. If so, I would like to take over maintenance of the XRN RPM (I am the maintainer of XRN).
Man page added in xrn-9.02-1. Thanks for noticing. Many packages are "maintained" (i.e. the spec file) by others, although only Red Hat builds the packages in the distribution. You're welcome to maintain xrn, just make a bug report like this (or send me mail) if you want Red Hat to rebuild xrn.