DESCRIPT.ION support for oputil fb scan

core/oputil/oputil_help.js

@@ -61,6 +61,10 @@ actions:
 
 scan args:
   --tags TAG1,TAG2,...         specify tag(s) to assign to discovered entries
+  --desc-file [PATH]           prefer file descriptions from DESCRIPT.ION file over
+                               other sources such as FILE_ID.DIZ.
+                               if PATH is specified, use DESCRIPT.ION at PATH instead
+                               of looking in specific storage locations
 
 info args:
   --show-desc                  display short description, if any