History of router 5 changes

In crates/oxy-server/src/lib.rs, lines 472–480 on f0ef9778e587df647ae83232422c5fbef4ad596fc475cdd35fcf266569bb34a9. 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 472,480:crates/oxy-server/src/lib.rs.