History of serve 3 changes

In crates/oxy-server/src/lib.rs, lines 523–541 on 0588de69a84d807a47d1013e20ecfaffe92fa1016b3470d10807e130edbcfb94. 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 523,541:crates/oxy-server/src/lib.rs.