Make it possible to ignore SSL errors from network communications

It seems  that the OpenSSL version  on some systems is  not capable of
correctly handling  intermediate certificates  for some  sites.  These
sites include SourceForge which we  use for serving sample files. This
change adds  a global handler for  QNAM SSL errors with  the option to
ignore them at the users discretion.

git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7359 ab8295b8-cf94-4d9e-aec4-7959e3be5d79

SampleDownloader/RemoteFile.cpp

@@ -139,15 +139,6 @@ void RemoteFile::download (QUrl const& url)
                  listener_->download_progress (bytes_received, total_bytes);
                }
            });
-  connect (reply_, &QNetworkReply::sslErrors, [this] (QList<QSslError> const& errors) {
-      QString message;
-      for (auto const& error: errors)
-        {
-          message += '\n' + reply_->request ().url ().toDisplayString () + ": "
-            + error.errorString ();
-        }
-      listener_->error ("Network SSL Errors", message);
-    });
 }
 
 void RemoteFile::abort ()