added -type test for find

filesystem.txt

@@ -199,6 +199,7 @@ of the more useful ones:
 | --------   | ---------                                                    |
 | -name *n*  | Match files containing *n*                                   |
 | -iname *n* | Case-insensitive version of -name                            |
+| -type *t*  | Match files of type *t* (f=normal file, d=directory, etc.)   |
 | -depth *d* | Limit the depth of the search                                |
 | -size *s*  | Match files with size matching *s*, like 10, 20k, 32M, etc.  |
 | -size -*s* | Match files smaller than *s*                                 |