SFTP not connecting in Ventura

This may be of interest. A couple of my sites are on Vodien (they took over the Australian hosting company Webcity). I was forced into Ventura without the option due to a fan and disk failure (under warranty and got my 2tb fusion drive replaced with a 3tb SSD at no cost!). I was running Big Sur. But I digress.

I could no longer SFTP to the hosting company. Turns out Ventura dropped support for ssh-rsa keys. I had to add the necessary information in the ssh_config file.