History of DirBackend::authorize 3 changes

In crates/oxy-server/src/lib.rs, lines 440–451 on v0.7.0. 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 440,451:crates/oxy-server/src/lib.rs.