Zabbix

...G...... [ZBX-26500] fixed system.users.num metric incorrect returned value for both agents

* commit '0b31359ca663ec567bf58c59e3c47e4ec9d71fd7':
  ...G...... [ZBX-26500] added ChangeLog
  ...G...... [ZBX-26500] changed PCI_TOTAL_SESSIONS to PCI_ACTIVE_SESSIONS to monitor active user sessions
  ...G...... [ZBX-26500] changed CounterTotalSessions to CounterActiveSessions in counting user numbers