History of Server::backend 1 change

In crates/oxy-server/src/lib.rs, lines 174–176 on 9ae4d15a0e4b6bec06c95b87d01e2fb2f407e3fab663d3613a8cbea7bb916cca. 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 174,176:crates/oxy-server/src/lib.rs.