History of dispatch 4 changes

In crates/hub/src/protocol.rs, lines 636–658 on 1062a0f8e985bb8c65ab90ccae6309f38730152b13ca9e9c579d6f5751053161. Every change that wrote or deleted one of these lines, or deleted a line from between them. Exact, because each line keeps its identity across edits; edits elsewhere in the file are not here. Also: oxy log -L 636,658:crates/hub/src/protocol.rs.