Allow to get and set options of the SSLContext and SSL

Motivation:

Often it is useful to be able to retrieve the previous set options for the SSLContext and SSL. Also changing SSL options later can be useful.

Modifications:

- Add SSLContext.getOptions(...)
- Add SSL.getOptions(...) and SSL.setOptions(...)

Result:

It's now possible to get previous set options for the SSLContext and SSL, and also possible to set SSL options.