History of DirBackend::open 2 changes

In crates/oxy-server/src/lib.rs, lines 460–469 on 2f0b4b0651ea3b534a83ef0c851ec3be69430d6e959e3b9ec6eb38b34eb7a12e. 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 460,469:crates/oxy-server/src/lib.rs.