History of Server::backend 1 change

In crates/oxy-server/src/lib.rs, lines 174–176 on fe8a49ce608fb84266d3c5f4cd5c44228122e1e6dba2dd3a013a4e535b4c4762. 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.