Hello Elwood,
The message "Connection closed by foreign host." usually means that
the client trying to connect to gqrx is not in the list of allowed
hosts. If you are on the same machine, make sure you have
::ffff:127.0.0.1 in the table, then try
telnet 127.0.0.1 7356
This works for me on Mac OS 10.11
Regarding your request, is this list you wish to "import" static or
changing? We already have the bookmarks feature which stores bookmarks
in a CSV file and shows them on the spectrum display. Not well
documented but we can provide more info if you wish. Clearly, this is
only useful for static lists, although we could probably make it so
that the CSV file is monitored and reloaded if it changes.
As for larger feature additions, I do not anticipate any further
development of gqrx because it has become too difficult to maintain.
It has too many external dependencies making it quite painful to
package and distribute in a user friendly way. So, I started working
on a lightweight replacement several years ago, and that is having
highest priority for me right now.
We still keep gqrx alive until it becomes unnecessary.
Alex