changing a RCS control file's name

Robert Threet <[email protected]> Wed, 12 Oct 2011 16:00:12 -0500
Newsgroups gmane.comp.gnu.rcs
Message-ID <[email protected]>
I thought I saw an command that would allow me to change the name of a 
file under RCS control without breaking the revision log.  Anyone now of 
such a command?