Zabbix

.......PS. [DEV-2440] moved user macro resolving to preprocessing workers

Merge in ZBX/zabbix from feature/DEV-2440-6.5 to master

* commit 'd5cc065b304d09cd07d5fe76a47a4ba0dbb96e46':
  .......PS. [DEV-2440] fixed merge
  .......PS. [DEV-2440] fixed user macro resolving failure in preprocesing step parameters
  .......PS. [DEV-2440] fixed preprocessing manager shutdown
  .......PS. [DEV-2440] fixed memory leak when updating preprocessing item configruation
  .......... [DEV-2440] fixed build
  .......... [DEV-2440] fixed build
  .......PS. [DEV-2440] moved function declarations to correct headers
  .......PS. [DEV-2440] moved user macro resolving in preprocessing step parameters to preprocessing workers
  .......PS. [DEV-2440] fixed configuration sync for macros with regex context
  .......PS. [DEV-2440] added user macro cache handle sharing by preprocessing workers
  .......... [DEV-2440] created libzbxpreprocbase library for configuration cache dependencies
  .......PS. [DEV-2440] moved hostid from zbx_pp_item_t to zbx_pp_item_preproc_t structure