`create_config_plot` seems to have issues with `asiolibs` connections

[jcfreeman2]

Basically, I'm looking at the configuration diagram in the asiolibs documentation, and what I see is that the SocketSenderApplication instance doesn't appear in the diagram to have any incoming or outgoing connections with other processes - which, physically speaking, isn't the case. It would be good to see if create_config_plot can be extended to handle this scenario.