History of Server::backend 1 change

In crates/oxy-server/src/lib.rs, lines 222–224 on 2452b4407ab7f6eb8fdb1d4b4427343da74643f1d4650f304dba8e6951f5604a. 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 222,224:crates/oxy-server/src/lib.rs.