PHP authentication failure: log straight to error log

data/web/inc/functions.inc.php

@@ -169,11 +169,7 @@ function check_login($user, $pass) {
 	}
 	elseif (!isset($_SESSION['mailcow_cc_username'])) {
 		$_SESSION['ldelay'] = $_SESSION['ldelay']+0.5;
-		$err = error_reporting(E_ALL);
-		ini_set('display_errors', 'off');
-		trigger_error("Mailcow UI: Invalid password for " . $user . " by " . $_SERVER['REMOTE_ADDR'], E_USER_WARNING);
-		ini_set('display_errors', 'on');
-		error_reporting($err);
+		error_log("Mailcow UI: Invalid password for " . $user . " by " . $_SERVER['REMOTE_ADDR']);
 	}
 	sleep($_SESSION['ldelay']);
 }