[BCP159]   Best Current Practice 159,
              <https://www.rfc-editor.org/info/bcp159>.
              At the time of writing, this BCP comprises the following:

              Gont, F., "Reducing the TIME-WAIT State Using TCP
              Timestamps", BCP 159, RFC 6191, DOI 10.17487/RFC6191,
              April 2011, <https://www.rfc-editor.org/info/rfc6191>.