History of router 5 changes

In crates/oxy-server/src/lib.rs, lines 511–519 on aa137bb8e77d7078508373ca5864ec23cc072164b9cd2c10407798ee85a8bc3e. 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.