Dynamic config loading

- 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

testdrive/testdrive.php

@@ -12,7 +12,7 @@ use Friendica\Core\Hook;
 use Friendica\Core\L10n;
 use Friendica\Database\DBA;
 use Friendica\Model\User;
-use Friendica\Util\Config\ConfigFileLoader;
+use Friendica\Util\ConfigFileLoader;
 use Friendica\Util\DateTimeFormat;
 
 function testdrive_install() {