traps
add new (as yet unwritten) virtual link stuff
NSSA
change intfs and areas to be sorted linked list
the external ase flush thing with same external instance
Neighbor formation when lots of routers on a lan should be done some number
	at a time rather than all at once?
Event cleanup routine for nbr_change, build_net, build_rtr, run_spf and flood
Make admstat work
ASE_Export_Limit and time should be configurable
