/**
   * @defgroup pkg_emb6 emb6 network stack
   * @ingroup  pkg
   * @ingroup  net
   * @brief    emb6 network stack
   * @see      https://github.com/hso-esk/emb6/raw/develop/doc/pdf/emb6.pdf
   *
   * emb6 is a fork of Contiki's uIP network stack without its usage of
   * proto-threads. It uses periodic event polling instead.
   */