[Guy Harris <guy@xxxxxxxxxxxx>]

Douglas Pratley wrote:

> b) I didn't want to restrict the possible names of fields. So far, all
> the ones in Wireshark are "sensible" strings, but I can't find any code
> that restricts them, so they might contain commas, spaces, etc.

See the loop in proto_register_field_init() which scans hfinfo->abbrev 
to make sure it only contains alphanumerics, "-", "_", and ".".