Zabbix

A.F.I...S. [ZBXNEXT-2592] split host groups functionality into host groups and template groups

* commit 'b3b32f88fb125642446939571a0668e449071ffb': (337 commits)
  ........S. [ZBXNEXT-2592] minor coding style improvements
  ........S. [ZBXNEXT-2592] fixed nested group type recognition in case multiple threads with different group types
  ........S. [ZBXNEXT-2592] minor coding style improvements
  ........S. [ZBXNEXT-2592] minor coding style improvements
  ........S. [ZBXNEXT-2592] minor coding style improvements
  ........S. [ZBXNEXT-2592] fixed formatting
  ........S. [ZBXNEXT-2592] removed redundant definisions; simplified SQL statement
  ........S. [ZBXNEXT-2592] fixed nested group type recognition
  ........S. [ZBXNEXT-2592] improved DBpatch_6010033_check_types() function
  ........S. [ZBXNEXT-2592] fixed identation in sql
  ........S. [ZBXNEXT-2592] fixed function return and minor refactoring
  ........S. [ZBXNEXT-2592] style fixes
  ........S. [ZBXNEXT-2592] style fixes
  ........S. [ZBXNEXT-2592] added handling of some related tables
  ........S. [ZBXNEXT-2592] Oracle fix
  ........S. [ZBXNEXT-2592] removed unnecessary sql-related code (fixes Oracle)
  ........S. [ZBXNEXT-2592] typo fix
  ........S. [ZBXNEXT-2592] typo fix
  ........S. [ZBXNEXT-2592] added handling of tables which reference groupid of hstgrp
  ........S. [ZBXNEXT-2592] fixed incorrect behaviour for parent template groups
  ...