Please sign (check) the below before submitting the Pull Request:

- [ ] I have signed the ntop Contributor License Agreement at https://github.com/ntop/legal/blob/main/individual-contributor-licence-agreement.md
- [ ] I have updated the documentation (in doc/) to reflect the changes made (if applicable)

Link to the related [issue](https://github.com/ntop/PF_RING/issues):


Describe changes:


