Instruct users how to prevent a warning. - #1809

           stderr:
               
               CondaHTTPError: HTTP 000 CONNECTION FAILED for url <https://repo.anaconda.com/pkgs/main/linux-64/repodata.json>
               Elapsed: -
               
               An HTTP error occurred when trying to retrieve this URL.
               HTTP errors are often intermittent, and a simple retry will get you on your way.
               
               If your current network has https://www.anaconda.com blocked, please file
               a support request with your network engineering team.
               
               'https://repo.anaconda.com/pkgs/main/linux-64'