History of Server::backend 1 change

In crates/oxy-server/src/lib.rs, lines 167–169 on 6eae06b6ec0478bd090b1dc0b282ccde811b8a5ab84f308b15c0d86be7afbc33. 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 167,169:crates/oxy-server/src/lib.rs.