History of Server::backend 1 change

In crates/oxy-server/src/lib.rs, lines 174–176 on dd6147dcf9c22b47a9554f274d633f4cbf1444d615a2504041e89b5225cfada0. 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.