History of Server::backend 1 change

In crates/oxy-server/src/lib.rs, lines 174–176 on f6451fbbae3f5bd13fe87928d1cc2ae109df40394ec1d46ac3cb12e82b89d8b1. 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.