if non-NULL. We do this prior to calling the encryption-system specific
functions in case some day they set qop_state.
Doug Rabson <dfr@nlsystems.com> encountered this bug while working on
RPCSEC_GSS code from UMich's NFSv4 project.
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@11015 ec53bebd-3082-4978-b11e-865c3cabbd6b