Don't add core to INCLUDEPATH.

src/core/net/dnsupdater.cpp

@@ -36,7 +36,7 @@
 #include <QUrlQuery>
 #endif
 #include "dnsupdater.h"
-#include "logger.h"
+#include "core/logger.h"
 
 using namespace Net;
 

src/core/net/dnsupdater.h

@@ -36,7 +36,7 @@
 #include <QNetworkReply>
 #include <QDateTime>
 #include <QTimer>
-#include "preferences.h"
+#include "core/preferences.h"
 
 namespace Net
 {

src/core/net/smtp.cpp

@@ -33,8 +33,8 @@
  */
 
 #include "smtp.h"
-#include "preferences.h"
-#include "logger.h"
+#include "core/preferences.h"
+#include "core/logger.h"
 
 #include <QTextStream>
 #ifndef QT_NO_OPENSSL