History of Server::backend 1 change

In crates/oxy-server/src/lib.rs, lines 168–170 on e8d38e47e9d796a9ead60d554c5e6eb223acaa1eec5922e59bfbecaa5fa939a0. 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 168,170:crates/oxy-server/src/lib.rs.