Going thru the files I found more copyright notices, the files have different copyrights (sorry for the wasted bandwith). It seems as if the code has been modified/written both at Purdue and Ohio State.
Can this be accepted as free (for Debian)? Copyright (c) 1990 The Ohio State University. All rights reserved. Redistribution and use in source and binary forms are permitted provided that: (1) source distributions retain this entire copyright notice and comment, and (2) distributions including binaries display the following acknowledgement: ``This product includes software developed by The Ohio State University and its contributors'' in the documentation or other materials provided with the distribution and in all advertising materials mentioning features or use of this software. Neither the name of the University nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.