[ns] Utilization measurements without a specific packet type

[Marco Studer]

Hello
I'm adding some endpoint admission controll functionality to ns. For 
that I've created new packet types (data and probing packets). On the 
tcl-side I use a queue-monitor object to measure the utilization but it 
keeps statistics for the whole traffic. For some scenarios I don't want 
to include probing packets. How can I measure the utilization without 
this packet type?

Thanks.

Marco