Checkmk Werk 10560: Extension packages: Add informational "Valid until version" field

ID: 10560 Title: Extension packages: Add informational "Valid until version" field Component: Core & setup Level: 1 Class: New feature Version: 1.7.0i1 Checkmk extension packages (MKPs) can now have a new field, which is named "Valid until Checkmk version". A package provider can now declare that a package is useful until a specific Checkmmk version. This may be useful when backporting fixes or features to older versions where it is already known that the official Checkmk package ships the same things as the package. Please note that this field is only for informational purposes at the moment. There is no automatic disabling of extension packages based on this field.