| API changes | |
| * Remove SSL error codes `MBEDTLS_ERR_SSL_CERTIFICATE_REQUIRED` | |
| and `MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH` which are never | |
| returned from the public SSL API. | |
| * Remove `MBEDTLS_ERR_SSL_CERTIFICATE_TOO_LARGE` and return | |
| `MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL` instead. |