History of serve 3 changes

In crates/oxy-server/src/lib.rs, lines 415–433 on v0.4.0. 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 415,433:crates/oxy-server/src/lib.rs.