- Bug report #2825989 (http://curl.haxx.se/bug/view.cgi?id=2825989) pointed

  out that OpenSSL-powered libcurl didn't support the SHA-2 digest algorithm,
  and provided the solution too: to use OpenSSL_add_all_algorithms() instead
  of the older SSLeay_* alternative. OpenSSL_add_all_algorithms was added in
  OpenSSL 0.9.5