Add @file markers for wiretap headers so that Doxygen will generate documentation for them.
Change-Id: I0b290df4783616f1eb15e6ad35fbd6d2b4c3dbdd Reviewed-on: https://code.wireshark.org/review/33865 Petri-Dish: Anders Broman <a.broman58@gmail.com> Tested-by: Petri Dish Buildbot Reviewed-by: Anders Broman <a.broman58@gmail.com>