Add @file markers for most files that contain functions exported with WS_DLL_PUBLIC so that Doxygen will generate documentation for them.
Ping-Bug: 15908 Change-Id: I25aaf772d3d0af2f459a1ad78d8253344ed13f05 Reviewed-on: https://code.wireshark.org/review/34025 Petri-Dish: Peter Wu <peter@lekensteyn.nl> Tested-by: Petri Dish Buildbot Reviewed-by: Peter Wu <peter@lekensteyn.nl>