Drop "private" subfolders

"private" subfolders violate the structure of the project,
since the existence of all other subfolders is based on a
different principle.
In addition, there is no clear line between "private" and
"non private".

src/base/net/downloadmanager.cpp

@@ -44,7 +44,7 @@
 #include "base/global.h"
 #include "base/logger.h"
 #include "base/preferences.h"
-#include "private/downloadhandlerimpl.h"
+#include "downloadhandlerimpl.h"
 #include "proxyconfigurationmanager.h"
 
 namespace

src/base/net/geoipmanager.cpp

@@ -40,7 +40,7 @@
 #include "base/utils/fs.h"
 #include "base/utils/gzip.h"
 #include "downloadmanager.h"
-#include "private/geoipdatabase.h"
+#include "geoipdatabase.h"
 
 static const QString DATABASE_URL = QStringLiteral("https://download.db-ip.com/free/dbip-country-lite-%1.mmdb.gz");
 static const char GEODB_FOLDER[] = "GeoDB";