+ -yaffs_trace [number]
+ this sets the yaffs_trace() function with the number inputed.
+ this number must be in the range of char.
+ yaffs_importer saves the current yaffs_trace value and restores the value after the branch has been imported.
+ setting this flag to -1 will run yaffs_importer with the default yaffs_trace value.
+
+Deleting files and folders