Adds initial intermediate qt6 porting state

qt6-after/qt6-migrated-legatus/Z/src/tcpserver/cbi_sendfile.h

@@ -0,0 +1,17 @@
+
+
+
+#pragma once
+
+#include "commandinterface.h"
+#include "tcpserver_export.h"
+
+class CBI_Sendfile : public CommandInterface
+{
+  Q_OBJECT
+public:
+  explicit CBI_Sendfile(unsigned short port);
+
+  void handleCommandInternal(const QVector<QByteArray> &args) override;
+  QString help() const override;
+};