History of router 5 changes

In crates/oxy-server/src/lib.rs, lines 373–381 on fb5b6181618a39ba4e6807b0d16b307d58b843457d5d3ca4cde526b1a7a6abae. 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.