Rename some hf[] display filter names to fix dups.

Backported (with no changes) from master e399382
See: https://code.wireshark.org/review/5535

Change-Id: Ibe932bc37e03194f1801ec4eed4da1ff31370de3
Reviewed-on: https://code.wireshark.org/review/5588
Reviewed-by: Bill Meier <wmeier@newsguy.com>