Build a cache of allowed SSL exceptions and use them on future network requests

The   class  NetworkAccessManager   sub-classes  QNetworkAccessManager
adding  a  message  box  to  ask   the  user  if  SSL  errors  may  be
ignored. Ignored errors  are ignored in future server  replies so that
the user is not asked about he same peer certificate chain repeatedly.
The cache is currently per process only and not persistent.

git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7361 ab8295b8-cf94-4d9e-aec4-7959e3be5d79

main.cpp

@@ -8,8 +8,6 @@
 
 #include <QDateTime>
 #include <QApplication>
-#include <QNetworkAccessManager>
-#include <QNetworkReply>
 #include <QRegularExpression>
 #include <QObject>
 #include <QSettings>
@@ -316,25 +314,8 @@ int main(int argc, char *argv[])
                                                                   ).toBool () ? 1u : 4u;
           }
 
-          QNetworkAccessManager network_manager {&a};
-
           // run the application UI
-          MainWindow w(temp_dir, multiple, &multi_settings, &mem_jt9, downSampleFactor, &network_manager, &splash);
-
-          // set up handling for any SSL issues
-          QObject::connect (&network_manager, &QNetworkAccessManager::sslErrors, [&w] (QNetworkReply * reply, QList<QSslError> const& errors) {
-              QString message;
-              for (auto const& error: errors)
-                {
-                  message += '\n' + reply->request ().url ().toDisplayString () + ": "
-                    + error.errorString ();
-                }
-              if (QMessageBox::Ignore == QMessageBox::question (&w, "Network SSL Errors", message, QMessageBox::Abort | QMessageBox::Ignore))
-                {
-                  reply->ignoreSslErrors ();
-                }
-            });
-
+          MainWindow w(temp_dir, multiple, &multi_settings, &mem_jt9, downSampleFactor, &splash);
           w.show();
           splash.raise ();
           QObject::connect (&a, SIGNAL (lastWindowClosed()), &a, SLOT (quit()));