History of dispatch 4 changes

In crates/hub/src/protocol.rs, lines 622–644 on ba0a55bb5b3cbbf862258bc5c9de6d41e5073b1fd1f730a7bbe7f87a25fcb327. 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 622,644:crates/hub/src/protocol.rs.