History of router 5 changes

In crates/oxy-server/src/lib.rs, lines 373–381 on 155313e68e154afe5ba12111a3b5b3fb0c4b29a02ce47ec48b03d2003da79b72. 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.