Only preserve a few conf files.

["dE ." <de.techno@gmail.com>]

By default, when overwriting config files, dpkg will ask about it and 
the default action will be no. On Desktop systems with inexperienced 
users, the default action may not be a good idea (for .e.g. when 
updating sudoers).

So is there a way to preserve only some conf files and overwrite the 
rest (as default action)? These configuration files are the ones that 
the admin modified so they should remain the default.