Checkmk Werk 12167: Fixed acknowledgement expiry

ID: 12167 Title: Fixed acknowledgement expiry Component: Core & setup Level: 2 Class: Bug fix Version: 2.1.0i1 Previously, the expiration mechanism for acknowledgements ignored the "persisten" flag, so the corresponding comments always vanished after expiration. Furthermore, the expiration of one acknowledgement didn't remove all other acknowledgements for the same host/service. Both aspects were inconsistent with the behavior of the manual removal of acknowledgements, which was quite confusing and unintended. This has been fixed, so acknowledgement expiry is identical to manual removal at the given point in time.