fesh: deprecate unencrypted ftp for CDDIS

[wehimwich]

It looks like an "anonymous" method is available with ftp-ssl:

https://cddis.nasa.gov/Data_and_Derived_Products/CDDIS_Archive_Access.html

Which might be a good idea to minimize dependence on a .netrc file in case some sites can't use that.

[wehimwich]

We aren't using a lot of BW, but this issue (and maybe #37) has become somewhat more important:

From: Michael, Benjamin P. (GSFC-61A0) benjamin.p.michael@nasa.gov
Sent: Monday, June 15, 2020 9:03 AM
To: ivsmail@lists.nasa.gov
Subject: REMINDER - TERMINATION of Anonymous ftp at CDDIS - Bandwidth Limiting Begins

Dear CDDIS Users,

Reminder that the first step in termination of unencrypted anonymous ftp at CDDIS takes places 1 July 2020. At that time CDDIS will bandwidth limit ALL IPs to just 1MB/s transfer rates. The second and third bandwidth reductions will take place as laid out in the original email announcing termination of unencrypted anonymous ftp (see below). Please give this email widest dissemination to your colleagues.

Instructions and example links are listed below in the original email. Pay particular attention to needing a .netrc file in some examples. Please address questions to support-cddis@earthdata.nasa.gov

R
Pat

[wehimwich]

This was closed by c06b612.