qobject_cast() missing from QObject reference documentation

(This affects qdoc with unmerged commits):
c089fee9 qdoc: Don't output docs for internal things
904c8ba7 qdoc: Update qdoc's QML parser
c1be21a9 qdoc: Corrected error in QDocDatabase::findQmlType()
732e3c9f qdoc: Part 2 of fix for inheriting abstract QML types
3084630a qdoc: Internal QML Types no longer marked public
33362b91 qdoc: Snippets files no longer parsed by qdoc
e50244f3 qdoc:headers and sources paths are canonicalized
a981b3c5 qdoc: Include internal types in the index files

qobject_cast() is missing from QObject reference documentation. These qdoc warnings may be useful for debugging:

/home/treinio/repos/qt5/qtbase/src/corelib/kernel/qobject.cpp:976: warning: Overrides a previous doc

976.    /*! \fn T *qobject_cast<T *>(QObject *object)
977.    \relates QObject

/home/treinio/repos/qt5/qtbase/src/widgets/kernel/qwidget.h:736: warning: (The previous doc is here)

736.    template <> inline QWidget *qobject_cast<QWidget*>(QObject *o)