Checkmk Werk 11971: API: extension of downtime endpoints functionality

ID: 11971 Title: API: extension of downtime endpoints functionality Component: Core & setup Level: 1 Class: New feature Version: 2.1.0i1 This werk introduces some changes to the downtime endpoints. The delete downtime endpoint's params option is renamed to 'by_id' and the params type now offers the option to select delete downtimes by their hostname and/or service descriptions.