History of Server::backend 1 change

In crates/oxy-server/src/lib.rs, lines 167–169 on eaa9bd54bdf25f9a28a30989366ce27c7e13dce7d48e6051015c88b0c35a51c6. 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 167,169:crates/oxy-server/src/lib.rs.