History of HubBackend::block 2 changes

In crates/hub/src/protocol.rs, lines 51–53 on df15b74774ca5bc2a21596eef9d70be392e4517c948b8af98000f4ac48223d92. 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.