Re: [RFC][PATCH] Print the usage string on stdout instead of stderr.

Michael J Gruber [off-list ref] writes:

Now, usage messages are displayed on specific request (-h) as well as
when a command is used with wrong arguments. So the classification
depends on the use case! But I reckon that even with '-h', usage strings
are not exactly "regular output", so stderr looks more natural to me.

Usage info specifically requested by the user is not error output, it is
the output of the command.  It should be output to stdout, not stderr.

[Note that for GNU progs, this behavior is explicitly required by the
GNU coding standards, and I think it's a pretty reasonable rule.]

-miles

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