Custom name in variables

Add code to analyze the fstab to determine whether we are in f2fs mode or ext4 mode

Add settings to enable/disable f2fs forcing mode so we can switch on the fly.  Force will force all wipe/format calls to use f2fs or ext4 depending on the selection.   Also added code to ensure settings are re-written back to internal sd after a super wipe.  Also removed fstab code to determine the mode since we now have a setting for it