History of dispatch 2 changes

In crates/hub/src/protocol.rs, lines 252–270 on 6f52a041933125c8a632f5764914febd39673e506693f8e5881598546368cd57. 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 252,270:crates/hub/src/protocol.rs.