Some improvements

- Move $_SERVER into ConfigFileManager constructor
- Rename "creatConfigFileLoader" to "createConfigFileManager"
- Rename variable "loader" to "manager" in all tests

src/Module/Admin/Summary.php

@@ -154,7 +154,7 @@ class Summary extends BaseAdmin
 		}
 
 		// check legacy basepath settings
-		$configLoader = (new Config())->createConfigFileLoader($a->getBasePath(), $_SERVER);
+		$configLoader = (new Config())->createConfigFileManager($a->getBasePath(), $_SERVER);
 		$configCache = new Cache();
 		$configLoader->setupCache($configCache);
 		$confBasepath = $configCache->get('system', 'basepath');