net-tools Code

When displaying usage output in response to the user requesting it
(e.g. using -h/--help), make sure we write the output to stdout and
we exit(0). When displaying output in response to an error (e.g.
an invalid option or argument), make sure we write the output to
stdout and exit non-zero. This brings us in line with standard
utilities out there.

URL: https://bugs.gentoo.org/655942
Signed-off-by: Mike Frysinger <vapier@...>