4.4BSD snapshot (revision 8.1); add 1993 to copyright
the bit_test() macro returns non-zero if set and zero if zeroFrom: abaddon@abyss.demon.co.uk (David Boyce)
fixed the under development line
macro and text revision (-mdoc version 3)
new copyright notice
remove side-effects, make value a pointer so could be a function
date and time created 89/12/13 20:59:09 by bostic