added timeouts to socks5 connection initialization

[Brranton]

Summary

added timeouts to socks5 connection initialization

Checklist

• I understand that this PR may be closed in case there was no previous discussion. (This doesn't apply to typos!)
• I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
• I've updated the documentation accordingly.

[Brranton]

this fixes issue #1015

[dmittov]

Thanks! I faced this issue today.
Socks proxy doesn't respond and the code stuck on awaiting stream.read much longer than I expected passing the explicit timeout to the request.

I hope this fix is merges soon. Looking forward.