Send error message to non-screen output devices also, if routing to

Send error message to non-screen output devices also, if routing to
listing files is enabled.  Bug #17238.  Thanks to John Darrington for
review.

* command/aggregate.sh: Update output to include error messages,
which are now sent to output files also.

* devices: Change raw-ascii from screen to listing device (because
that's how it's used).