History of router 5 changes

In crates/oxy-server/src/lib.rs, lines 511–519 on 78b49d4d01f02cf8dbb613b49369c7d6eb82ed3a8218dcdbe0bb65960ad33bf0. 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.