History of router 5 changes

In crates/oxy-server/src/lib.rs, lines 373–381 on 0bb901cbd059f0072bcc6e565a7d9e4b8ba6ce502365ff9c99c07c822abdf10a. 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.