HttpsUrlAvailable: version 2.1.5-r1: SRC_URI: HTTPS url available: http://iij.dl.sourceforge.jp/nkf/70406/nkf-2.1.5.tar.gz -> https://iij.dl.sourceforge.jp/nkf/70406/nkf-2.1.5.tar.gz
  SSLCertificateError: version 2.1.5-r1: SRC_URI: SSL cert error: HTTPSConnectionPool(host='osdn.dl.sourceforge.jp', port=443): Max retries exceeded with url: /nkf/70406/nkf-2.1.5.tar.gz (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: certificate has expired (_ssl.c:1010)'))): https://osdn.dl.sourceforge.jp/nkf/70406/nkf-2.1.5.tar.gz