Update to 2.067
- New upstream release 2.067
- Fix memory leak on incomplete handshake (GH#92)
- Add support for SSL_MODE_RELEASE_BUFFERS via SSL_mode_release_buffers; this
can decrease memory usage at the costs of more allocations (CPAN RT#129463)
- More detailed error messages when loading of certificate file failed (GH#89)
- Fix for ip_in_cn == 6 in verify_hostname scheme (CPAN RT#131384)
- Deal with new MODE_AUTO_RETRY default in OpenSSL 1.1.1
- Fix warning when no ecdh support is available
- Documentation update regarding use of select and TLS 1.3
- Various fixes in documentation (GH#81, GH#87, GH#90, GH#91)
- Stability fix for t/core.t