History of router 5 changes

In crates/oxy-server/src/lib.rs, lines 339–347 on 65aebbe4905695016bf49c89a2e9eed1eb729c3adb971b178d928664319b04f2. 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.