Enable acceptance of specific self-signed certificates

[lenucksi]

It would be nice to if I'd be prompted to accept a self-signed certificate by fingerprint instead of giving a generic error message that the connection was not possible.

[nerzhul]

Yeah it's an idea i get since a long time but i don't get time to do this atm and how to properly implement this. I'm just sure it's mandantory to have last HTTP code bug fixes