History of router 5 changes

In crates/oxy-server/src/lib.rs, lines 418–426 on show-stat. 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 418,426:crates/oxy-server/src/lib.rs.