Is this still the case? If so, can't you provide a default constructor for backwards compatibility?

Hi yes, it is still the case, yes I can provide backwards compatibility, I'll update the code.

Also, in the README changes, you removed the line of stopping servers.

That's right, I'll add those lines.

You also removed the examples for use in junit testing (although I admit I forgot to update this myself, when I switched to JUnit 5).

I'm not exactly sure what I have to add, could you please help me out there?

And also, previously it was demonstrated in the documentation that you can start multiple listeners on different ports. I feel this point got lost in your version.

IMO, letting one single instance start multiple listeners on different port feels wrong. Each instance of SocksServer should only effectively manage one server, along with customization to each individual server.