[Pkg-rust-maintainers] dh-cargo_5_source.changes ACCEPTED into unstable

[Josh Triplett]

On Mon, Jun 18, 2018 at 08:25:14AM +0000, Debian FTP Masters wrote:
>    * Pass `--cap-lints warn` in rustflags to avoid builds breaking when rustc
>      adds new warnings.

What is the rationale for this? Rust already does this for dependent
crates. And I don't think it makes sense to do it for the top-level
crate.