History of router 5 changes

In crates/oxy-server/src/lib.rs, lines 353–361 on 8349c327fe830af77bf0a837f70ad5dee39ef26819619b06be67aeb3b8364165. 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 353,361:crates/oxy-server/src/lib.rs.