Make syslog of call status configurable
    
    Add a parameter (syslog_status) to configuration and
    CLI (--syslog-status).  This logs the results of GSSAPI calls at
    LOG_DEBUG.  Typically these calls resemble:
    
        gssproxy[28914]: (OID: { 1 2 840 113554 1 2 2 }) Unspecified GSS
        failure.  Minor code may provide more information, No credentials
        cache found
    
    Since these messages worry some admins, turn them off by default.
    
    Signed-off-by: Robbie Harwood <rharwood@redhat.com>