Labels on Link nodes

[drmibell]

@Paul-Reed It’s partly a matter of what you’re used to. In electronics, schematic diagrams often use this trick to show where connections go in a circuit, especially when it would be too confusing to show all the links or where they extend across multiple pages of a diagram. I think that functional names belong on the nodes that do the work. In NR, the wires have no names or properties other than their endpoints, and logically speaking link nodes are the same thing.