[BCP208]   Best Current Practice 208,
              <https://www.rfc-editor.org/info/bcp208>.
              At the time of writing, this BCP comprises the following:

              Fairhurst, G., "Network Transport Circuit Breakers",
              BCP 208, RFC 8084, DOI 10.17487/RFC8084, March 2017,
              <https://www.rfc-editor.org/info/rfc8084>.