Tests failing for Content-Length with multiple values

[ghostd]

The fetch specification has been updated to handle multiple values for the Content-Length header.

The tests are here

The hyper client fails while parsing the headers, i opened an issue to track the problem.

[ghostd]

The issue is fixed with the release 0.4.15.

I tried to upgrade hyper in servo (from 0.12 to 0.14), but i'm stuck with a serde issue:

error[E0277]: the trait bound `for<'de> De<http::HeaderMap>: Deserialize<'de>` is not satisfied
   --> components/net_traits/lib.rs:668:18
    |
668 |     pub headers: Option<Serde<HeaderMap>>,
    |                  ^^^^^^^^^^^^^^^^^^^^^^^^ the trait `for<'de> Deserialize<'de>` is not implemented for `De<http::HeaderMap>`
    | 
   ::: /home/xxxx/.cargo/registry/src/github.com-1ecc6299db9ec823/hyper_serde-0.11.1/src/lib.rs:182:27
    |
182 |     where for<'de> De<T>: Deserialize<'de>,
    |                           ---------------- required by this bound in `Serde`
    |
    = help: the following implementations were found:
              <De<(http::status::StatusCode, std::string::String)> as Deserialize<'de>>
              <De<ContentType> as Deserialize<'de>>
              <De<Mime> as Deserialize<'de>>
              <De<Tm> as Deserialize<'de>>
            and 4 others

I guess we need to update and finish this hyper_serde PR, but i'm not yet very comfortable with this king of serialization issues :-/