History of Server::backend 1 change

In crates/oxy-server/src/lib.rs, lines 174–176 on d0bf2da150949093a1d5207bde8a4f69c55599bd7de6db7eca460e6376fbae41. 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.