title: zabbix ldap login faild
body: <p>i use zabbix and ldap. my config in Administration->Authentication is ok and test is pass. show in below picture 
  <a href="https://i.stack.imgur.com/bNj7N.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/bNj7N.jpg" alt="zabbix config is ok"></a></p>
  
  <p>but when i want login with zabbix form the login is fail and say me user or pass is incorrect 
  <a href="https://i.stack.imgur.com/vy465.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/vy465.jpg" alt="enter image description here"></a></p>