History of router 5 changes

In crates/oxy-server/src/lib.rs, lines 538–546 on 232aabb5452d64b37861ebe61aaabacb012e4ae041f141bc0a51e00d4c8986a5. 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 538,546:crates/oxy-server/src/lib.rs.