ability to configure what needs to be backed up

[rajatjindal]

Hello @pshima, thank you for writing this tool. It seems to be quite useful.

Would it be ok to add the ability to configure what parts need to be backed up? e.g., in the code, we use the error msg to check if ACLs are enabled or not, and it might be nice to be able to configure that.

If this sounds like an acceptable feature to add, I am happy to submit PR.

Thanks again
Rajat Jindal