History of router 5 changes

In crates/oxy-server/src/lib.rs, lines 511–519 on 135bdcadec4a43fedada0e38778c38829a89b489743d1abf2684f35b02486bc6. 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.