rmt-0.4b19-5.6x install should create symlink /etc/rmt; system will not function as a tape server otherwise. Test tape clients were Solaris 8 and another redhat 6.2. Also, bugzilla "Product" list does not include rmt, so I report this as trouble with dump!
The symlink has been present for a long time, but the package was misbuilt with /usr/etc rather than /etc. Fixed in dump-0.4b20-1.6x (or check the value of the rpm macro %_sysconfdir and recompile).
*** Bug 19325 has been marked as a duplicate of this bug. ***
This bug has indeed been fixed for quite some time, I'm not sure how it got left deferred. Closing bug. It is fixed in RHL 7.2, perhaps earlier releases as well.