Expose additional options for ss remote backup

[romfeo]

Following our discussion on discord:

I would like to request to be able to set the port number for RClone in ss-config.

Additionally, I would like to request to be able to connect to Rsync via ssh like:

rsync --progress -e 'ssh -p23' --recursive <local_directory> @.your-storagebox.de:<target_directory>

[jessuppi]

Thanks for posting this @romfeo

Can you also include the Rclone command syntax that Hetzer told you to use? Technically SlickStack only supports B2 buckets for Rclone right now, because supporting multiple vendors is a huge challenge.

[jessuppi]

Related:

https://github.com/rclone/rclone-webui-react/issues/55

https://forum.rclone.org/t/rclone-custom-ip-port/12835