History of router 5 changes

In crates/oxy-server/src/lib.rs, lines 339–347 on f184f6d51a9fe44d6168a4a62ca865be722f38622540e8657f713d8b0ea9e093. 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.