To add further information to my own question: it would appear that the kubernetes project performs this a third way. The top-level license file is their own A

To add further information to my own question: it would appear that the kubernetes project performs this a third way. The top-level license file is their own Apache license, but their GODEPS folder contains a file, LICENSES, that is very long, and built up by concatenating all the licenses of their source projects. https://raw.githubusercontent.com/kubernetes/kubernetes/master/Godeps/LICENSES https://raw.githubusercontent.com/kubernetes/kubernetes/mast...