History of router 5 changes

In crates/oxy-server/src/lib.rs, lines 410–418 on 68dcf21fe055a74837d05b252985fd4b9fecf236720f013ada16a50516e9c5be. 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 410,418:crates/oxy-server/src/lib.rs.