You're still keeping sensitive information in your code base, so that's not a configuration file
Ah yes...I see the difference...
However, I don't see what practical difference it makes assuming there is no encoding going on. If the code has access to the file that holds the sensitive information then surely the developer has access to the contents of that file either directly or through their code. I feel I am missing something here.
In the 'real' code for the module, the only things that are pulled out of the module code are the database schema name, username and password. I only took table names out to share it in a public place for security purposes. Currently these are contained in a Perl module that does nothing but hold this kind of information and it would be good if I could amend this to a 'better', more secure arrangement especially as I am refactoring one of the sites that needs this information and now would be the perfect opportunity to do it.