History of dispatch 4 changes

In crates/hub/src/protocol.rs, lines 622–644 on 8bb7baeb4557754a8602cf6a0b0ef3e4335ff5a0703e417a53c2e61aaf825036. 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.