History of HubBackend::block 2 changes

In crates/hub/src/protocol.rs, lines 51–53 on 4745b9844987f696f39f21d7036d00f92adec2b9a507e740fdb7bd28f5fd1d72. 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 51,53:crates/hub/src/protocol.rs.