4.4BSD snapshot (revision 8.1); add 1993 to copyright
stdc.h -> cdefs.h
new copyright notice
ANSI C version from Chris
store both chars in register to force optimization; Chris's version
install approved copyright notice
written by Robert Elz; add Berkeley specific header
added LIBC_SCCS condition for sccs ids
date and time created 85/08/05 21:43:09 by kre