4.4BSD snapshot (revision 8.1); add 1993 to copyright
exp__D, exp__E, log__D, and log__L are private; prepend leading "__"
check in from Peter McIlroy; add exp__D, log__D, struct Double
"const" handled by sys/cdefs.h
new copyright notice
date and time created 90/06/01 15:39:25 by bostic