History of Server::backend 1 change

In crates/oxy-server/src/lib.rs, lines 168–170 on faa9cd0579d37845979389ccc2816e166c7907359a3975e23942dd8f7634f252. 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 168,170:crates/oxy-server/src/lib.rs.