- Move settings, defaults and dbstructure to directory 'static'
- Dynamic loading of config files (after the static loading)
- Filter out '-sample.config.php' and '-sample.ini.php' files
- Remove unnecessary ConfigFileManager
- Move ConfigFileLoader to Utils
- Add tests for multi-loading for INI, config and sample-filtering
- Remove obsolete file-only config list
- Fix heading level
- Add transition instruction for $lang
- Add reference to config.ini.php, settings.ini.php and addon.ini.php
- Add link to help page in admin warning about legacy config file
