[Fscrub] Backup files before handling

[HJFinch]

To prevent potential loss of important data, we have to add a backup option copying every file modified to a defined (-backup=/tmp/bck) backup location.

[GodMod]

You should not use /tmp as default backup location, as every user has access to this folder. Just as a note.

[kwiesmueller]

Sure, that's pretty obvious. The path in the ticket is merely a syntax example. But thanks.