History of router 5 changes

In crates/oxy-server/src/lib.rs, lines 373–381 on 631fc8970bd0c661d21514be9ee52785edec89d9ad5b4704974e3ccbafc57626. 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.