NOISSUE put legacy FTB support in a namespace, fix its base URL

api/logic/modplatform/legacy_ftb/PrivatePackManager.cpp

@@ -0,0 +1,41 @@
+#include "PrivatePackManager.h"
+
+#include <QDebug>
+
+#include "FileSystem.h"
+
+namespace LegacyFTB {
+
+void PrivatePackManager::load()
+{
+    try
+    {
+        currentPacks = QString::fromUtf8(FS::read(m_filename)).split('\n', QString::SkipEmptyParts).toSet();
+        dirty = false;
+    }
+    catch(...)
+    {
+        currentPacks = {};
+        qWarning() << "Failed to read third party FTB pack codes from" << m_filename;
+    }
+}
+
+void PrivatePackManager::save() const
+{
+    if(!dirty)
+    {
+        return;
+    }
+    try
+    {
+        QStringList list = currentPacks.toList();
+        FS::write(m_filename, list.join('\n').toUtf8());
+        dirty = false;
+    }
+    catch(...)
+    {
+        qWarning() << "Failed to write third party FTB pack codes to" << m_filename;
+    }
+}
+
+}