This allows you to do:
  ./config.status --the-option-you-forgot
Signed-off-by: NDr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <1452599928-7471-1-git-send-email-dgilbert@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>