5 bug fixes for the nu (new user) program

[reid at Glacier.ARPA]

You claimed in your previous message that "nu -d" does not exist or work. It
works just fine in the version of nu that I sent out, and I just tried it
again a minute or two ago to make sure it really did work. Some damage must
have happened to the archive file in transmission. For this reason I have
not installed any of your bug fixes in the ``master'' copy of nu, though
when I get a chance to do it by hand, I will.