Offer custom SSH options.

[mirisbowring]

The problem

I backup multiple repos with different SSH Keys to my Server. I am using SSH forced Commands to map specific repositories to specific keys.
Now, If I have e.g. 2 Repositories and 2 Keys for my current Machine, the second Backup always fails with "Path not allowed".

The Reason is, that SSH (even with the -i Option enabled) uses the first key it finds in .ssh folder.

Requested Solution

A User on StackExchange proposed a working solution by using additional custom SSH arguments.

https://superuser.com/a/1777452

This may be not the case for anybody which is why i would like to have an option (similar to the custom borg args) to specifiy additional SSH options.

Alternatives

Additional context