History of serve 4 changes

In src/cli/sync.rs, lines 720–748 on 7a3cc5149a1462290d018fa2b022c6dadfc89ce48dd3222db48712431fcc1ab6. 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 720,748:src/cli/sync.rs.