Zabbix

..F....PS. [ZBXNEXT-6406] removed requirement of host interface for server-originated checks

Merge in ZBX/zabbix from feature/ZBXNEXT-6406-6.1 to master

* commit '8bb7b814afe3d13a50e620bc2052475b5b8e1cd3':
  .......... [ZBXNEXT-6406] fixed Selenium test, added new optional interface type
  .......... [ZBXNEXT-6406] updated testMassUpdateItems autotest
  ........S. [ZBXNEXT-6406] changed error messages slightly
  ........S. [ZBXNEXT-6406] fixed coding style problems
  ..F....... [ZBXNEXT-6406] fixed asterisk for discovered items
  ........S. [ZBXNEXT-6406] more code style fixes and changelog
  ........S. [ZBXNEXT-6406] fixing coding style and memory leaks for tests
  ........S. [ZBXNEXT-6406] various test and coding style fixes
  ........S. [ZBXNEXT-6406] fixed tests for jenkins
  ........S. [ZBXNEXT-6406] Made host interface optional for ssh, telnet and simple checks, cmocka tests
  .......... [ZBXNEXT-6406] added required interface tests
  .......... [ZBXNEXT-6406] added test cases for item type with optional interface
  ..F....... [ZBXNEXT-6406] removed duplicate code; improved optional check in js
  ..F....... [ZBXNEXT-6406] fixed converter 10 were using item type to interface type mapping from master
  .......... [ZBXNEXT-6406] removed accidentaly added file
  ..F....... [ZBXNEXT-6406] fixed host interfaces
  ..F....... [ZBXNEXT-6406] added frontend changes