[vweb] Add ssl support

[inxomnyaa]

Currently it does not seem possible to have vweb running with SSL enabled

It would be great if you could add a way to use/detect installed certificates in vweb

[JalonSolov]

These days, it would be better to have auto "Let's Encrypt" support built-in. That would be support for obtaining a certificate from Let's Encrypt, auto-renewal/replacement on expiration, etc.

Optionally, you should be able to specify a certificate and turn off the Let's Encrypt support.

[medvednikov]

I think it's much better to use nginx for this.

It'll be supported, but it's definitely not a priority.