History of cstr 1 change

In crates/flow/src/syscall.rs, lines 670–672 on v0.2.0. 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 670,672:crates/flow/src/syscall.rs.