History of router 5 changes

In crates/oxy-server/src/lib.rs, lines 538–546 on 835ceb9b3ea7dbbc62c73f3a8c60c701e2f10be290e3fe95188a01a65a132cd0. 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.