[BCP79]    Best Current Practice 79,
              <https://www.rfc-editor.org/info/bcp79>.
              At the time of writing, this BCP comprises the following:

              Bradner, S. and J. Contreras, "Intellectual Property
              Rights in IETF Technology", BCP 79, RFC 8179,
              DOI 10.17487/RFC8179, May 2017,
              <https://www.rfc-editor.org/info/rfc8179>.