Steel Bank Common Lisp

rename-file on windows gives an error if you try to rename a file to  
another name if the name is that of an existing file. This is not the  
case on Linux or Mac OS X, where this is allowed. Looking at the  
Common Lisp spec it is not clear whether this is a bug, but it is a  
real pain. Can this be fixed?

Thanks,
Stephen Westfold

PS Please don't get rid of sb-int:define-hash-table-test without  
providing an equivalent capability.