> Servers MUST use TLS version 1.2 or higher and SHOULD use TLS
> version 1.3 or higher. TLS 1.2 is reluctantly permitted for now to
> avoid drastically reducing the range of available implementation
> libraries. Hopefully TLS 1.3 or higher can be specced in the near
> future. Clients who wish to be "ahead of the curve MAY refuse to
> connect to servers using TLS version 1.2 or lower.
Does this option also allow connections through TLS 1.3 (if socat even
supports them at all) ?