History of router 5 changes

In crates/oxy-server/src/lib.rs, lines 339–347 on b3b9c2f3069c462e72fe80575e4af7c4b61f18c56d90da2de64eb5489736747d. 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 339,347:crates/oxy-server/src/lib.rs.