[Helge Kruse <Helge.Kruse@xxxxxxx>]

While implementing a dissector I need to unregister hfinfo structs. 
These structs had been created temporarily and should be deleted. 
Someting similar can also be found in packet-http.c, line#2122.

The libWireshark.dll exports proto_register_field_array but 
unfortunately not proto_unregister_field. Hence this functionality is 
not supported for dissector plug-ins. Can you please add 
proto_unregister_field to the export list in libwireshark.def?

Thanks,
Helge