4.4BSD snapshot (revision 8.1); add 1993 to copyright

KNF, integrate with standard include files (quad -> quad_t etc.)

GCC2 changed the type of the shift count; make this work since we
still use both compilers. This should be ripped out as soon as possible.
From Chris Torek

shifts parameters are quads too

new version from Chris Torek

Prepend the gcc-2.1 release copyright notice to all source code

BITS_PER_UNIT -> NBBY

put on a Berkeley copyright notice -- original didn't have a GNU
copyright, I'll add one as soon as I find out which one to add
date and time created 92/05/12 15:19:57 by bostic