[SECURITY] Fedora 27 Update: tnef-1.4.15-1.fc27

This application provides a way to unpack Microsoft MS-TNEF MIME attachment s. It operates like tar in order to unpack files of type “application/ms-tnef”, which may have been placed into the MS-TNEF attachment instead of being attached separately. Such files may have attachment names similar to WINMAIL.DAT