Pythonic SOCKS5 support

[skelsec]

Looks like you don't have many issues to take care of, so here is a feature request!
It would be awesome to have Impacket support SOCKS5 proxies.

I have successfully used this module: https://github.com/Anorov/PySocks by monkeypatching examples/psexec.py
Guess that is not a professional solution, but I don't wish to spend time making a fully tested pull request as it would modify the current code base in a way you probably would not like it and reject is anyways :)
Let me know what you think about this!

[asolino]

Why not proxychains?

[skelsec]

Some of my clients force me to use their standardized windows laptops for hacking them pentesting. AFAIK there is no substitute for proxychains in windows.
Having this feature would make this library work with socks proxies on both windows and linux and would make pivoting much easier for people.
Also I could help in this and/or buy you a beer.

[anadrianmanrique]

following up in #1903