Use names more like the other names in open_info.

For open_info, use names based on the names in other lists.

Also, in comments, indicate what the three count 'em three tables are
used for, and clean up the type/subtype table.

Change-Id: I7a763119e790d5970f87dff05284f465eebfb7e7
Reviewed-on: https://code.wireshark.org/review/4599
Reviewed-by: Guy Harris <guy@alum.mit.edu>