History of Server::backend 1 change

In crates/oxy-server/src/lib.rs, lines 174–176 on b689779e9e7428f68bef6dfc047bf9fcb4a6ba516fd5e9b34c9ea067c830d974. 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.