Log the type of parsed network traffic

[cesher]

Latest experiment indicates that pcap is not the issue, packets are getting non-zero timestamps. The question then becomes: How is it possible to observed parsed network traffic where both the first packet and last packet timestamps are zero if we can definitely see that pcap timestamped each packet correctly?

I think this indicates that the zero timestamp issue must be coming from within the the assembler or within the stream.go file. The following change will confirm which of the two.

Either:

• The assembler does indeed manipulate the timestamps, somehow setting them to zero.
• The parsed network traffic we observe with zero timestamps is actually DroppedBytes.