History of router 5 changes

In crates/oxy-server/src/lib.rs, lines 511–519 on c397a8c36a9f9b5249938b0715447836232c970d76d3952cd95a95d1282eaca3. 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 511,519:crates/oxy-server/src/lib.rs.