Check_MK Werk 3837: Fixed empty check if lnx_if info contains additional line

ID: 3837 Title: Fixed empty check if lnx_if info contains additional line Component: Checks & Agents Level: 1 Class: Bug Fix Version: 1.4.0i1 The output of lnx_if check has been empty if the interface provides an additional line provided by CDP (Cisco Discovery Protocol). This is fixed now but not further handled at the moment and may be a feature in the future.