Fix a small UNIX bug where the JSON output was getting managed by errors on stdout

[prologic]

No description provided.

[karolba]

Thank you!

[nieomylnieja]

hey @prologic :) first of all, thanks for the contribution!
Unfortunately the approve on this one was a bit rushed, we can't introduce this change because it is a breaking change.
Users could be relying on the fact that the stdout contains these messages.
I agree the current behavior is not ideal, but our main focus with a widely adopted and long lived project like this one is to keep backward compatibility first.

That being said we'd love to help you solve your use case, one potential solution is to add a configuration setting to sloctl which would allow you to redirect these outputs to stderr.
Let me know what you think!

[prologic]

No problems!