History of router 5 changes

In crates/oxy-server/src/lib.rs, lines 373–381 on 9df6217f5f4749afbf52c40f1032cdbbde91dd3b9de8bcc97fc383012bf59842. 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 373,381:crates/oxy-server/src/lib.rs.