sftpgo-auth: allow chmod

sftpgo-auth.php

@@ -28,7 +28,7 @@ if (!in_array('ht', explode(',', $account['services']), true))
 	deny('Service not enabled for this user.');
 
 const SFTPGO_DENY_PERMS = ['/' => ['list']];
-const SFTPGO_ALLOW_PERMS = ['list', 'download', 'upload', 'overwrite', 'delete_files', 'delete_dirs', 'rename_files', 'rename_dirs', 'create_dirs', 'chtimes'];
+const SFTPGO_ALLOW_PERMS = ['list', 'download', 'upload', 'overwrite', 'delete_files', 'delete_dirs', 'rename_files', 'rename_dirs', 'create_dirs', 'chmod', 'chtimes'];
 if ($auth_data['password'] !== '') {
 	if (checkPassword($account['id'], $auth_data['password']) !== true)
 		deny('Wrong password.');