message: Don't enable HTTP1 pipelining as apparently it's flaky
  It seems to fix some issues perhaps!
diff: @@ -287,7 +287,7 @@ impl<'cfg> PackageSet<'cfg> {
  // We've enabled the `http2` feature of `curl` in Cargo, so treat
  // failures here as fatal as it would indicate a build-time problem.
  let mut multi = Multi::new();
  - multi.pipelining(true, true)
  + multi.pipelining(false, true)
  .chain_err(|| "failed to enable multiplexing/pipelining in curl")?;
  Ok(PackageSet {
  