History of Server::backend 1 change

In crates/oxy-server/src/lib.rs, lines 174–176 on cd4eb55e3b3d5201e29f6e6a59a5839b4d184864adcfbd988cb5401e1d25a03f. 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.