Zabbix

.......PS. [ZBXNEXT-8621] improved asynchronous pollers to read configuration in separate thread to avoid blocking

Merge in ZBX/zabbix from feature/ZBXNEXT-8620-6.5 to master

* commit 'e01eb0c63625dc51b29bab8d62eafbbb6b0c5a68': (23 commits)
  .......PS. [ZBXNEXT-8620] fixed preprocessing log level control
  .......PS. [ZBXNEXT-8621] removed redundant variable
  .......PS. [ZBXNEXT-8621] removed redundant function
  .......PS. [ZBXNEXT-8621] removed redundant function
  .......PS. [ZBXNEXT-8621] moved configuration read from async poller to separate thread to avoid blocking
  .D........ [ZBXNEXT-8621] added ChangeLog entry
  .......PS. [ZBXNEXT-8620] moved configuration read from async poller to separate thread to avoid blocking
  .......PS. [ZBXNEXT-8620] moved configuration read from async poller to separate thread to avoid blocking
  .......PS. [ZBXNEXT-8620] moved configuration read from async poller to separate thread to avoid blocking
  .......PS. [ZBXNEXT-8620] moved configuration read from async poller to separate thread to avoid blocking
  .......PS. [ZBXNEXT-8620] moved configuration read from async poller to separate thread to avoid blocking
  .......PS. [ZBXNEXT-8620] moved configuration read from async poller to separate thread to avoid blocking
  .......PS. [ZBXNEXT-8620] moved configuration read from async poller to separate thread to avoid blocking
  .......PS. [ZBXNEXT-8620] moved configuration read from async poller to separate thread to avoid blocking
  .......PS. [ZBXNEXT-8620] moved configuration read from async poller to separate thread to avoid blocking
  .......PS. [ZBXNEXT-8620] moved configuration read from async poller to separate thread to avoid blocking
  .......PS. [ZBXNEXT-8620] moved configuration read from async poller to separate thread to avoid blocking
  .......PS. [ZBXNEXT-8620] moved configuration read from async poller to separate thread to avoid blocking
  .......PS. [ZBXNEXT-8620] moved configuration read from async poller to separate thread to avoid blocking
  .......PS. [ZBXNEXT-8620] moved configuration read from async poller to separate thread to avoid blocking
  ...