Bug#922277: su: write errors to STDERR not STDOUT

[積丹尼 Dan Jacobson]

Package: util-linux
Version: 2.33.1-0.1

Can you believe this error message is written to STDOUT

    # su -c : nobody|wc
          1       6      41
    # su -c : nobody
    This account is currently not available.

instead of STDERR!