Prepare backports for 42.0.6 release (#10929)

* Upgrade openssl package for libressl 3.9.1 support

* Ensure a good error message when cffi module fails to import

* CHANGELOG

* Bump version for 42.0.6 release

* It's not FIPS anymore

* Resolve new clippy warnings (#10755)

The fixes themselves are of marginal value 🙃

* fix warning from latest nightly rust (#10486)

* fix warning from latest nightly rust

* Update lib.rs