- throw the exceptions in
    TimeService_new_universal_time() upon invalid parameters
    TIO_spans() upon invalid UTO
  This needs some investigation on the inaccuracy value (DCE DTS)
- correct the timezone parameter calculation
- more testing
- check for the --secure parameter and general parameter handling
- write example code and helper functions to make the TimeService
  more easily usable (e.g. see Appendix D of the specification)
- implement the TimerEventService as soon as the EventService is usable 

