[ticket/15747] Change parameter depth to boolean

PHPBB3-15747

phpBB/phpbb/storage/provider/local.php

@@ -37,8 +37,14 @@ class local implements provider_interface
 	public function get_options()
 	{
 		return [
-			'path' => array('type' => 'text'),
-			'depth' => array('type' => 'text'),
+			'path' => ['type' => 'text'],
+			'subfolders' => [
+				'type' => 'radio',
+				'options' => [
+					'ENABLE' => '1',
+					'DISABLE' => '0',
+				],
+			],
 		];
 	}