new test case to show receiving DIO,
generation of DAO an DIO events and that no events are create for uninteresting DIOs
make sure that pcap files are closed after use.
make sure that old events are removed when processed
adjust make depend to use architecture and OS
events need to be tracked so that they can be renewed
and deleted when done.  This work revealed that the map implementation of the queue is wrong
implementation and unit test of priority queue for events
removed dead map code, added fixed time for testing to event and iface
added missing setting for output to pcap file