[ext/openssl] Purpose of OpenSSL::PKCS12.new / Allow changing the password
It seems as if currently creating a PKCS12 with OpenSSL::PKCS12.new is not very useful, all the attributes
are read-only. So this could probably be removed or the attributes could be write-accessible, too.
Apart from that, it would also be nice to be able to change the password of an existing PKCS#12 file.