[RFC] Lint packages for configuration files not listed in `conf_files`

[ahesford]

It might be nice to add a post-install lint that emits warnings when apparent configuration files are discovered in well-known directories but not listed in the package's conf_files. Apparently configuration files could be identified simply by expecting particular extensions, for example:

• conf
• cfg
• ini
• yaml
• yml
• toml

and "well-known dirctories" might just be the /etc hierarchy, or might include a few others. Comments and recommendations for additional paths, extensions or alternative methods for discovering configuration files are appreciated.

[Anachron]

What about ${pkgname}rc files? A lot of tools also simply use "config" as name.

[Chocimier]

See #21649