i386/amd64 install CD suddenly much less robust

[Thor Lancelot Simon <tls%panix.com@localhost>]

It appears someome made sysinst ignore ^Z and restart itself on ^C.

I don't think this is a good thing, even though it is still possible to
exit sysinst from the main menu.

One of the best things about our install CD was always that you could
just hit ^C or ^Z and fix, adjust, or look at details quickly by hand
in the middle of the install.  Now we can't.  And what have we gained
by this?

I think it would be good to put this back how it was.

-- 
Thor Lancelot Simon                                              
tls%panix.com@localhost
    And now he couldn't remember when this passion had flown, leaving him so
  foolish and bewildered and astray: can any man?
                                                   William Styron