[tz] Astrolabe dismisses suit

I'm happy that the matter is resolved, and would like to express my appreciation to everyone who helped: Corynne McSherry of EFF, Adam Kessel and Olivia Nguyen of Fish & Richardson, Arthur David Olson for putting up so patiently with these legal hassles, Robert Elz for taking over coordination and doing such a fine job, and everyone who sent in data in the meantime. I hope to rejoin the throng.