Checkmk Werk 11338: Fix "Fortigate Active Sessions" ruleset duplicates

ID: 11338 Title: Fix "Fortigate Active Sessions" ruleset duplicates Component: WATO Level: 1 Class: Bug fix Version: 2.0.0i1 In previous versions, there were two WATO rules which had the name "Fortigate Active Sessions" where one concerned the Cluster environment. This change renames the Cluster rule to allow a proper differentitation.