Zabbix

A......... [ZBX-19111] improved performance of checking circular and double linkages of templates

* commit 'd716facd50c7d9a44c27b5b32b673471c3b63dc7':
  A......... [ZBX-19111] fixed code style to provide easier readability
  A......... [ZBX-19111] removed unused parameter from SQL query
  A......... [ZBX-19111] fixed phpdoc code style
  A......... [ZBX-19111] improved performance of checking circular and double linkages of templates