
of an arbitrary extension: e.g. 1.3.4.5=critical,RAW:12:34:56 Using this technique currently unsupported extensions can be generated if you know their DER encoding. Even if the extension is supported in future the raw extension will still work: that is the raw version can always be used even if it is a supported extension.
WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING This is ***VERY*** new experimental code and is likely to change considerably or vanish altogether.