History of router 5 changes

In crates/oxy-server/src/lib.rs, lines 339–347 on f97d3556db5fec09ebd0c519f38c855eef859a7e49be0f41a477423d175fc3a9. 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.