Zabbix

...G....S. [ZBXNEXT-4781] added new eventlog.count item key

Merge in ZBX/zabbix from feature/ZBXNEXT-4781-6.5 to master

* commit '908aa7044326a8f4b3bc8a8aa233d8b6446094a9':
  ...G...... [ZBXNEXT-4781] correctred skipping old data functionality for eventlog count item
  ...G...... [ZBXNEXT-4781] removed rudementary line of code
  ...G...... [ZBXNEXT-4781] updated signature for the process value functions within Zabbix agent 2 eventlog
  ...G...... [ZBXNEXT-4781] fixed Zabbix agent 2 crash and it not updating lastlogsize properly
  .......... [ZBXNEXT-4781] corrected changelog
  .......... [ZBXNEXT-4781] added changelog
  ...G...... [ZBXNEXT-4781] added vector class fnctionality, code style fixes, fixed eventlog.count item
  ...G...... [ZBXNEXT-4781] fixed eventlog count item stopping counting entries
  ...G...... [ZBXNEXT-4781] fixed Zabbix agent headers on windows
  ...G...... [ZBXNEXT-4781] fixed agent 2 crash on new item key and code style fixes with minor refactoring
  ...G...... [ZBXNEXT-4781] improved performance of the eventlog and eventlog.count items
  ...G...... [ZBXNEXT-4781] fixed eventlog count item key call
  ...G....S. [ZBXNEXT-4781] resued log count metric flag
  ...G....S. [ZBXNEXT-4781] fixed global regular expressions for new item key, aslo other minor fix
  ...G...... [ZBXNEXT-4781] added new item key to the Zabbix agent