History of Server::backend 1 change

In crates/oxy-server/src/lib.rs, lines 174–176 on 87828a0b1f36064f63356114a73cc08f1646ed739d37e1a6e5826b06d6087209. 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.