4.4BSD snapshot (revision 8.1); add 1993 to copyright
memcpy and memmove must always return first arg
bcopy takes a void *, not a char *
stdc.h -> cdefs.h
build memcopy and memmove out of fast bcopy code
Chris Torek's new version; runs better on non-aligned addresses/lengths
fixed backwards copy by words
make it compile *and* work (and portable)
bcopy and bzero don't return any value
make it compile...
add Berkeley specific copyright; written by Robert Elz
new addition for portability