History of Server::backend 1 change

In crates/oxy-server/src/lib.rs, lines 174–176 on 4f264d6f20b65ff1f248b38ca76d5c8d9dea82368884f3e5cca01bca1113d299. 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.