History of Server::backend 1 change

In crates/oxy-server/src/lib.rs, lines 167–169 on 05e71ed6cdf1cd789b178c7fe119ae2b0158a8de2b31020eca30f61ac4fd6f40. 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.