History of router 5 changes

In crates/oxy-server/src/lib.rs, lines 373–381 on d4dbab97e9481a95cd2b7bb47747f967e3eee85da7397703a77692aa688f34a9. 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.