DO without EDNS

[mohshami]

Allow setting the do flag without having to explicitly enable an EDNS option.

Sometimes we would like to validate DNSSEC but not enable PADDING or any of the other options

Also this way padding won't override edns and they won't override subnet

[mohshami]

Hello, where you able to take a look at this?

Thank you

[ameshkov]

I don't like the idea of adding OPT by default.

Let's do this only when do is true.

[mohshami]

Thank you so much, something came up so I won't be able to check this for the next few days. Will get back to it as soon as I can