History of router 5 changes

In crates/oxy-server/src/lib.rs, lines 511–519 on 6c3dbe2018e0dc400f47dd6a8f33748393649b94b7fd05ba62120bbe7a3d9ccf. 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 511,519:crates/oxy-server/src/lib.rs.