History of router 5 changes

In crates/oxy-server/src/lib.rs, lines 339–347 on 60a1223c894fc10e022c0ce16abdbdf27064ca478400353c117f8d8f70caf951. 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 339,347:crates/oxy-server/src/lib.rs.