History of router 5 changes

In crates/oxy-server/src/lib.rs, lines 511–519 on 7f617ee9b3addf9a4397443ce5fb7f6e85e1b26e43dc7baff170dced360c4185. 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 511,519:crates/oxy-server/src/lib.rs.