History of router 5 changes

In crates/oxy-server/src/lib.rs, lines 373–381 on 69816d68830059c6155cbc8b14376c47c805a3d978e49de8daf28c648424a823. 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 373,381:crates/oxy-server/src/lib.rs.