[BCP224]   Best Current Practice 224,
              <https://www.rfc-editor.org/info/bcp224>.
              At the time of writing, this BCP comprises the following:

              Weis, B., Gagliano, R., and K. Patel, "BGPsec Router
              Certificate Rollover", BCP 224, RFC 8634,
              DOI 10.17487/RFC8634, August 2019,
              <https://www.rfc-editor.org/info/rfc8634>.