History of DirBackend::open 2 changes

In crates/oxy-server/src/lib.rs, lines 313–322 on 3f1b8fe25ec99cbdc6d5bbac60f00651ad88b2fc7a139ebd29eb0734f9bb8789. 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 313,322:crates/oxy-server/src/lib.rs.