Fix 2001/schweikh - check args

This was not documented. The limitations have not been addressed as they
were documented. The bugs.md and README.md have been updated for this.

2001/schweikh/README.md

@@ -16,7 +16,7 @@ make
 The current status of this entry is:
 
 ```
-STATUS: known bug - please help us fix
+STATUS: INABIAF - please **DO NOT** fix
 ```
 
 For more detailed information see [2001 schweikh in bugs.md](/bugs.md#2001-schweikh).