Checkmk Werk 12558: Fix "Remote alert handlers (Linux)" rule processing

ID: 12558 Title: Fix "Remote alert handlers (Linux)" rule processing Component: Setup Level: 1 Class: Bug fix Version: 2.1.0i1 Checkmk 2.0 was not able to display values of rules created with previous Checkmk versions. The rules created with Checkmk 2.0 were also not displayed correctly and additionally were not processed correctly during agent baking. Rules created with previous 2.0 releases need to be deleted and recreated.