Zabbix

.......PS. [DEV-4647] optimized memory usage of asynchronous pollers (snmp, agent, httpagent)

* commit '5881b8aec4eee7f7798074866da97186f0deffd6': (39 commits)
  .......PS. [DEV-4647] removed unused fields
  .......PS. [DEV-4647] removed unused fields, fixed code style
  .......PS. [DEV-4647] fixed code style
  .......PS. [DEV-4647] removed asserts from async_initiate_queued_checks
  .......PS. [DEV-4647] removed unused fields
  .......PS. [DEV-4647] changed logging in async_check_snmp_*, removed unused variable
  .......PS. [DEV-4647] fixed code style
  .......PS. [DEV-4647] removed unused fields, refactored zbx_dc_config_get_poller_items
  .......PS. [DEV-4647] fixed incorrect flag usage
  .......PS. [DEV-4647] removed unused includes
  .......PS. [DEV-4647] changed struct and variable names
  .......PS. [DEV-4647] optimized asynchronous pollers memory usage
  .......PS. [DEV-4647] optimized asynchronous pollers memory usage
  .......PS. [DEV-4647] optimized asynchronous pollers memory usage
  .......PS. [DEV-4647] made key and key_orig in zbx_dc_snmp_item_t and zbx_dc_agent_item_t never point to the same memory
  .......PS. [DEV-4647] refactored zbx_async_check_snmp and zbx_async_check_snmp_dc_item
  .......PS. [DEV-4647] fixed missing 'End of...' logs
  .......PS. [DEV-4647] merged zbx_dc_config_clean_httpagent_items with zbx_clean_httpagent_items, removed dead code paths
  .......PS. [DEV-4647] removed dead code paths, refactored zbx_prepare_*_items() functions
  .......PS. [DEV-4647] removed redundant includes, fixed code style
  ...