History of DirBackend::open 2 changes

In crates/oxy-server/src/lib.rs, lines 433–442 on 642da2636de23fd2aee00ace74e1ec4abace8241fb73d3f30519be0fdc1d4c8c. 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 433,442:crates/oxy-server/src/lib.rs.