History of Server::backend 1 change

In crates/oxy-server/src/lib.rs, lines 222–224 on 9aec107d1071104cac89c32434f29b484a7389cb8b9bfd8f943bbda5116ca102. 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 222,224:crates/oxy-server/src/lib.rs.