Checkmk Werk 13422: Don't show cluster checks for standalone FortiGate

ID: 13422 Title: Don't show cluster checks for standalone FortiGate Component: Checks & agents Level: 1 Class: Bug fix Version: 2.2.0i1 The services "Cluster Info", "CPU utilization Cluster", "Memory Cluster" and "Sessions Cluster" where discovered even if the FortiGate device was in standalone mode. Those services will no longer be discovered.