Checkmk Werk 13765: Fritz!Box check plugins: Handly empty data correctly

ID: 13765 Title: Fritz!Box check plugins: Handly empty data correctly Component: Checks & agents Level: 1 Class: Bug fix Version: 2.2.0i1 The Fritz!Box check plugins did not handly empty data correctly: <ul> <li><tt>fritz_wan_if</tt> crashed with <tt>KeyError (NewLayer1DownstreamMaxBitRate)</tt>.</li> <li><tt>fritz_conn</tt>, <tt>fritz_config</tt> and <tt>fritz_link</tt> reported UNKNOWN.</li> </ul> Now, these plugins go stale instead, as expected.