History of Server::backend 1 change

In crates/oxy-server/src/lib.rs, lines 174–176 on f2f91ceb0e9f3b142481ddf2e851fa037beb14cc00a186b7cfe61bf45b030ba4. 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 174,176:crates/oxy-server/src/lib.rs.