Do not write pcap header to the named pipe.

[bserdar]

This is to make worker start reading packets from an existing pcap file.

[mertyildiran]

The PCAP reader of sniffer container which opens the named pipe tls.pcap requires the file header to determine the first layer of the packets. The two containers start/restart together unless manually intervened and it should be fail safe. The file must be a valid PCAP file for the sake of clean implementation and debuggability.

[alongir]

Not sure it's connected. However, traffic that was successfully captured by the Tracer is not read by the Worker.
@iluxa is on it: #14