Fix CI

[daxpedda]

Apparently pub extern crate requires docs with the missing_docs lint and you can't use #[allow(...)] on it. So replacing it with pub use fixes this issue.

Also sprinkled some #[allow(clippy::redundant_clone)] until rust-lang/rust-clippy#10873 reaches stable.

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (8ab73a1) 73.58% compared to head (e1b2b80) 73.58%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #628   +/-   ##
=======================================
  Coverage   73.58%   73.58%           
=======================================
  Files          47       47           
  Lines        7637     7637           
=======================================
  Hits         5620     5620           
  Misses       2017     2017           

Flag	Coverage Δ
main	58.98% <ø> (ø)
test--	78.34% <ø> (ø)
test--server_system	61.63% <ø> (ø)
test-client_system-	69.36% <ø> (ø)
test-client_system-server_system	51.62% <ø> (ø)

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[elinorbgr]

I would prefer to keep them as pub extern crate, to make it explicit in the generated documentation that they are reexported crates.

So instead let's just going to put some basic documentation on them. Older rustc apparently just ignores it.

[elinorbgr]

Actually it looks like even nightly rustdoc ignores documentation of pub extern crate items when generating the documentation. Not sure why this lint was enabled then. 🤷‍♀️

[daxpedda]

Actually it looks like even nightly rustdoc ignores documentation of pub extern crate items when generating the documentation. Not sure why this lint was enabled then. woman_shrugging

That is so weird ... on the brighter side of things: CI is fixed? 🤣

[elinorbgr]

Yes, thanks!