History of Server::backend 1 change

In crates/oxy-server/src/lib.rs, lines 174–176 on e226a6cc2f713b7b3f71469ba12d5dcb5543e151909a781928f90a4ae8df95e6. 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.