• SSH2: add "smart multi factor" login mode (enabled by default) (#1648)
• SSH2: error out when no data is received from the server (#1647)
• SFTP: don't attempt to parse unsupported attributes (#1708)
• SFTP: getSupportedVersions() call didn't work
• EC: error out when scalar is out of range (#1712)
• RSA: add support for raw private keys (#1711)
• SymmetricKey: add getMode()