Additional genrsa option support

[jcottr]

createPrivateKey() only takes one option (keyBitsize), while genrsa offers many additional options; most commonly used are:

• encryption cipher (e.g. des3, aes256)
• encryption password

I would fork and patch, but it looks like the current implementation is very permissive about the type of keyBitsize, so I worry that any change I would make might break some existing clients. I could prepare a patch that expects an options object instead of keyBitsize, but I think we'd need to rev the major version. Is that something you're okay with?

[andris9]

I don't have any preferences as long as it doesn't break existing clients. You could add an optional argument that includes the new params and if the argument is missing it wouldn't be used – this would keep old clients running but would allow to use the new stuff.

[Dexus]

@jcottr
tomorrow i will look at this and add optional param for encryption and password.

[Dexus]

#48 - can now be closed