Checkmk Werk 13265: netapp_api_if: discover interfaces even if they have no `recv_data` entry

ID: 13265 Title: netapp_api_if: discover interfaces even if they have no `recv_data` entry Component: Checks & agents Level: 1 Class: Bug fix Version: 2.2.0i1 Discovery for `netapp_api_if` would skip interfaces with no entry for amount of received data (for historical) reasons. This change makes the discovery function discover even those interfaces without this information resulting in potentially more discovered items.