* Fix type confusion in some scenarios
When the feature for rustls 0.22 is enabled, and rustls 0.23 is also
present in a project, there suddently exist multiple paths for errors
when building middleware chains due to the use of two consecutive `?`
operators without specifying the intermediate error type.
This commit addresses the issue by removing the first `?`, so that the
first error type will always be known, and the second `?` always has a
well defined implementation.
* Add CHANGES entry about type confusion
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Co-authored-by: Rob Ede <robjtede@icloud.com>
