Linux Distros with CVS/RCS for Config Files?

bergeron76 asks: "Does anyone know of a Linux distributions or modifications to a Linux d system that implement a CVS[like] structure for control over system configuration files (/etc, /usr/etc, and so on)? Personally, I'd love to see a distro that featured a native CVS/RCS control mechanism for editing system configuration files. Does anything like this currently exist? If not, is anyone working in this direction?"