helper utilities for use with the libtrace process library

 libtrace is a library for trace processing. These tools perform many common
 tasks that are required when analysing and manipulating network traces.
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 Multiple input methods and formats are supported including device capture,
 raw and gz-compressed traces, and sockets.
 .
 libtrace is developed by the WAND Network Research Group at Waikato
 University in New Zealand.