Add support for TLS client authentication at the host level

[alexandrestein]

Because I use Armor as a gate way for some of my hosts I need to have different TLS configuration.

This pull request provides a way to set multiple client CA certificates encode into DER themselves encoded into base64 to verify client authentication.

I did not see any test files so I did not made any.

But I updated the documentation accordingly.

[vishr]

@alexandrestein I will back to it soon. Ping me if it is late.

[alexandrestein]

Hi @vishr.
When do you think it's getting late? 😊

[alexandrestein]

Hello @vishr.

It's really long now. 😞
The changes are pretty small and easy to review.

The massive changes at the documentation are accidental.
It has been made by my format engin.

Except the documentation, it is pretty clear what the code does.

Please consider tacking a look at this. 😉

[alexandrestein]

Great, thank you 🙏
💪