RANCID for server config

Hi,

I think that RANCID can be used as well for keeping track
of the changes in the configuration files of a server.
Has anybody tried to modify RANCID for this purpose,
or do you know any tool that does a similiar job?
Because I don't want to reinvent the wheel.

Also, what do you think about this looking glass in PHP:=20
http://phplg.sourceforge.net/
Or maybe it is not too quick and dirty to be classified
as a tool?

Thank you,
Dashamir