History of router 5 changes

In crates/oxy-server/src/lib.rs, lines 410–418 on switch-says. 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 410,418:crates/oxy-server/src/lib.rs.