4.1.1 (2019-04-30)

        * Updated to nlbuild-autotools 1.6.9.

4.1.0 (2019-01-04)

        * Added multicast group management APIs to the Inet layer for raw IP
          and UDP endpoints.

4.0.2 (2018-11-19)

        * Updated to nlbuild-autotools 1.6.5.

4.0.1 (2018-11-15)

        * Updated to nlbuild-autotools 1.6.4.