[BCP29]    Best Current Practice 29,
              <https://www.rfc-editor.org/info/bcp29>.
              At the time of writing, this BCP comprises the following:

              Droms, R., "Procedure for Defining New DHCP Options",
              BCP 29, RFC 2489, DOI 10.17487/RFC2489, January 1999,
              <https://www.rfc-editor.org/info/rfc2489>.