changegroup: rename manifest linknode closure for clarity Since I'm spending the time to understand this code, I may as well leave it clearer than I found it.

changegroup: reformat packermap and add comment I'm about to add a cg3, and it seems prudent to annotate what formats support what features. It strikes me that we may want to consider moving to a more feature-oriented model in the future, but we'll see how that looks in a little while I guess.