code: @Override
    public String slaveof(final String host, final int port) {
      client.slaveof(host, port);
      return client.getStatusCodeReply();
    }
docs: Change the replication settings.
  <p>
  The SLAVEOF command can change the replication settings of a slave on the fly. If a Redis
  server is already acting as slave, the command SLAVEOF NO ONE will turn off the replication
  turning the Redis server into a MASTER. In the proper form SLAVEOF hostname port will make the
  server a slave of the specific server listening at the specified hostname and port.
  <p>
  If a server is already a slave of some master, SLAVEOF hostname port will stop the replication
  against the old server and start the synchronization against the new one discarding the old
  dataset.
  <p>
  The form SLAVEOF no one will stop replication turning the server into a MASTER but will not
  discard the replication. So if the old master stop working it is possible to turn the slave
  into a master and set the application to use the new master in read/write. Later when the other
  Redis server will be fixed it can be configured in order to work as slave.
  <p>
  @param host
  @param port
  @return Status code reply