[3dem] DNS name changes for PDB archive downloads from wwPDB to start September 2023

[Justin Flatt]

In 2022, wwPDB introduced DNS names [1] for programmatic access to PDB 
archive downloads:

  	* FTP: https://urldefense.com/v3/__ftp://ftp.wwpdb.org__;!!Mih3wA!FyLGzpJZ6drmJylsTZyBm9ieoi9UYl0CAxszGnjoWbXYSGaMz_KvfVczOMHOJd7TVNePOo77vraxvDKGAmtRTHbv$ 
  	* HTTPS: https://urldefense.com/v3/__https://files.wwpdb.org__;!!Mih3wA!FyLGzpJZ6drmJylsTZyBm9ieoi9UYl0CAxszGnjoWbXYSGaMz_KvfVczOMHOJd7TVNePOo77vraxvDKGAsGPPo_H$  (replaces https://urldefense.com/v3/__https://ftp.wwpdb.org__;!!Mih3wA!FyLGzpJZ6drmJylsTZyBm9ieoi9UYl0CAxszGnjoWbXYSGaMz_KvfVczOMHOJd7TVNePOo77vraxvDKGArrKHLpg$ )
  	* RSYNC: rsync://rsync.wwpdb.org (replaces rsync://wwpdb.org)

The PDB Archive Downloads [2] documentation has detailed information.

Starting September 2023, wwPDB will start enforcing use of these updated 
DNS names. URLs in which the DNS name doesn't match the protocol (e.g., 
https://urldefense.com/v3/__https://ftp.wwpdb.org__;!!Mih3wA!FyLGzpJZ6drmJylsTZyBm9ieoi9UYl0CAxszGnjoWbXYSGaMz_KvfVczOMHOJd7TVNePOo77vraxvDKGArrKHLpg$ , https://urldefense.com/v3/__ftp://files.wwpdb.org__;!!Mih3wA!FyLGzpJZ6drmJylsTZyBm9ieoi9UYl0CAxszGnjoWbXYSGaMz_KvfVczOMHOJd7TVNePOo77vraxvDKGAhw_sXF1$ ) will no longer work at 
that time.

Users who download PDB archive data programmatically are encouraged to 
switch to the new DNS names as soon as possible. HTTPS protocol is 
preferred (over FTP) for individual file downloads.

Please contact info at wwpdb.org with any questions.

Links:
------
[1] https://urldefense.com/v3/__http://www.wwpdb.org/news/news?year=2022*6303be3b707ecd4f63b3d3d9__;Iw!!Mih3wA!FyLGzpJZ6drmJylsTZyBm9ieoi9UYl0CAxszGnjoWbXYSGaMz_KvfVczOMHOJd7TVNePOo77vraxvDKGAkvOo-lG$ 
[2] https://urldefense.com/v3/__http://www.wwpdb.org/ftp/pdb-ftp-sites__;!!Mih3wA!FyLGzpJZ6drmJylsTZyBm9ieoi9UYl0CAxszGnjoWbXYSGaMz_KvfVczOMHOJd7TVNePOo77vraxvDKGAvix1h9t$ 
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