Zabbix

...G...... [ZBX-15484] fixed mysql m4, restore value of LIBS variable

* commit 'de441d00170797008655497a4ef767c474f9aa28':
  ...G...... [ZBX-15484] unset _save_mysql_libs variable
  ...G...... [ZBX-15484] fixed mysql m4, restore value of LIBS variable