68881 upgrade for 3-50

[Guy Harris]

>For your info, there is also an empty socket for HW support of DES using,
>I think, an Intel chip.

"/usr/include/sundev/desreg.h" on our 4.0 system:

/*	@(#)desreg.h 1.12 88/02/08 SMI	*/

/*
 * Copyright (c) 1986 by Sun Microsystems, Inc.
 */

/*
 * Definitions of the AM Z8068 Data Ciphering Processor chip.
 */

I think there's supposed to be a "D" after the "AM", as in "AMD"; in any
case, it's not Intel.