Zabbix

........S. [ZBX-20177] added acknowledgeid index for alerts table

* commit '914bccc2c2dcac3d20703562037f5c46ecdd4688':
  ........S. [ZBX-20177] upped optional dbversion in schema.tpl
  ........S. [ZBX-20177] removed extra blank lines
  ........S. [ZBX-20177] added acknowledgeid index for alerts table