Merge branch '6550-mysql-user-password-not-updated-when-changing-it-from-ispconfig' into 'develop'

Resolve "ISPConfig does not show red blinking dot when MySQL user password is changed"

Closes #1782 and #6550

See merge request ispconfig/ispconfig3!1782

Author: Till Brehm

interface/lib/classes/db_mysql.inc.php

@@ -847,7 +847,7 @@ public function datalogStatus($login = '') {
 
 		$result = $this->queryAllRecords("SELECT COUNT( * ) AS cnt, sys_datalog.action, sys_datalog.dbtable
 				FROM sys_datalog, server
-				WHERE server.server_id = sys_datalog.server_id AND sys_datalog.user = ? AND sys_datalog.datalog_id > server.updated
+				WHERE (server.server_id = sys_datalog.server_id or sys_datalog.server_id = 0) AND sys_datalog.user = ? AND sys_datalog.datalog_id > server.updated
 				GROUP BY sys_datalog.dbtable, sys_datalog.action",
 			$login);
 		foreach($result as $row) {