Zabbix

.......PS. [ZBXNEXT-7948] optimized preprocessing manager cache refresh

Merge in ZBX/zabbix from feature/ZBXNEXT-7948-6.3-3 to master

* commit '836d49798fbff6f63ebf15c5b33fc8e35a535e00': (30 commits)
  .D........ [ZBXNEXT-7948] added changelog entry
  .......PS. [ZBXNEXT-7948] style fix
  .......PS. [ZBXNEXT-7948] optimized removed preprocessing item detection
  .......PS. [ZBXNEXT-7948] removed preprocessing cache trace dump if configuration cache revision was not changed
  .......PS. [ZBXNEXT-7948] fixed preprocessing sync
  .......PS. [ZBXNEXT-7948] added preallocation of host items vector
  .......PS. [ZBXNEXT-7948] changed itemids hashset inital size allocation based on preprocessing cache items rather than configuration cache
  .......PS. [ZBXNEXT-7948] moved itemids hashset initial size calculation to read lock
  .......PS. [ZBXNEXT-7948] update item type and value type in preprocessing cache for existing items
  .......PS. [ZBXNEXT-7948] updated comment
  .......PS. [ZBXNEXT-7948] fixed preprocessing cache index allocation
  .......PS. [ZBXNEXT-7948] optimized temporary preprocessing index allocation
  .......PS. [ZBXNEXT-7948] moved initial configuration revision check out of cache lock
  .......PS. [ZBXNEXT-7948] fixeed preprocessing item local history resetting when preprocessing has been changed
  .......PS. [ZBXNEXT-7948] moved cache unlock earlier when preprocessing manager is getting preprocessable items
  .......PS. [ZBXNEXT-7948] remove redundant null check
  .......PS. [ZBXNEXT-7948] removed redundant check
  .......PS. [ZBXNEXT-7948] fixed memory leak when master item is removed and processed before removed dependent items
  .......PS. [ZBXNEXT-7948] avoid retrieving host revision from user macro cache if all items on host are monitored by Zabbix proxy
  .......PS. [ZBXNEXT-7948] avoid retrieving host revision from user macro cache if all items on host are monitored by Zabbix proxy
  ...