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  DeadUrl: version 2021d: SRC_URI: HTTPSConnectionPool(host='downloads.sourceforge.net', port=443): Read timed out. (read timeout=5.0): https://downloads.sourceforge.net/project/gretl/gretl/2021d/gretl-2021d.tar.xz
  DeadUrl: version 2021d: metadata.xml: remote-id: 429 Client Error: Too Many Requests for url: https://sourceforge.net/projects/gretl/