DeadUrl: version 2.1.3-r2: SRC_URI: 404 Client Error: Not Found for url: http://www.qtrac.eu/diffpdf-2.1.3.tar.gz
  SSLCertificateError: version 2.1.3-r2: HOMEPAGE: SSL cert error: HTTPSConnectionPool(host='www.qtrac.eu', port=443): Max retries exceeded with url: /diffpdf.html (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1006)'))): https://www.qtrac.eu/diffpdf.html