The Debian package used to modify upstream's Makefiles to install rcsfreeze along with the rest of the RCS binaries. Sometime in 2012 I dropped this patch with the following commit message:
* Stop shipping the rcsfreeze script as upstream doesn't support it. I don't remember if ttn (RCS upstream) specifically requested for the Debian patch to be dropped, or if it's the result of some mailing-list discussion. Either way I don't think there's much point in re-adding this script, at this point it's of historical interest only.
