* Revert "Revert "openssl_csr: Allow to use cryptography as backend (#50324)""
This reverts commit bbd2e31e9f.
* Remove more complicated selection copy'n'pasted from openssl_privatekey.
* Add tests for backend selection.
* Add openssl_csr test for arbitrary string commonName.
* Allow to disable commonName -> SAN copying (fixes#36690).
* Fixed#47505: Type error in openssl_certificate
* Use to_bytes instead of str.encode in SelfSignedCertificate. Updates #47508
* Use to_bytes instead of str.encode in OwnCACertificate
* Added integration tests for openssl_certificate: selfsigned_not_before/after and ownca_not_before/after