Zabbix

..F....... [ZBX-21898] fixed expression history function parser to accept backslashes without escaping

* commit 'd4892a7c6e3ce5e0d06ededd313b3643b763a540':
  ..F....... [ZBX-21898] added some other test cases for successful backslash and quote parsing
  ..F....... [ZBX-21898] sligtly changed one test case not to mix it with previous one
  ..F....... [ZBX-21898] fixed frontend-phpunit tests
  ..F....... [ZBX-21898] removed unnecessary elseif statement
  ..F....... [ZBX-21898] removed unnecessary space
  ..F....... [ZBX-21898] fixed expression history function parser to accept backslashes without escaping