code: public Configuration addConfiguration(final KNXNetworkLink link)
  	{
  		final ConfigImpl c = new ConfigImpl(link);
  		configs.add(c);
  		return c;
  	}
docs: Creates and adds a new configuration for the supplied network link to this network
  buffer.
  <p>
  By default, the added configuration is not activated, and no filters are set by the
  network buffer.<br>
  If the supplied <code>link</code> gets closed, the created configuration will get
  deactivated (see {@link Configuration#activate(boolean)}), and the buffered link of
  the configuration, obtained with {@link Configuration#getBufferedLink()}, will get
  closed as well.
  
  @param link KNX network link communicating with the KNX network
  @return the new configuration