If the function succeeds, the return value will be the handle of the
HNFileAdapter object. Otherwise the return value will be NULL.
The one only reason for unsuccessful HNFileAdapter object creation
can be a lack of memory.
Description:
Creates an instance of HNFileAdapter necessary to work with
a CAP file.
HNFileAdapter provides reading/dumping packets from/to a CAP
file and gathering the traffic statistics.
