doxygen -u Doxyfile.in

warning: Tag `SYMBOL_CACHE_SIZE' at line 299 of file `Doxyfile.in' has become obsolete.
         This tag has been removed.
warning: Tag `SHOW_DIRECTORIES' at line 487 of file `Doxyfile.in' has become obsolete.
         This tag has been removed.
warning: Tag `HTML_ALIGN_MEMBERS' at line 817 of file `Doxyfile.in' has become obsolete.
         This tag has been removed.
warning: Tag `USE_INLINE_TREES' at line 970 of file `Doxyfile.in' has become obsolete.
         This tag has been removed.
warning: Tag `XML_SCHEMA' at line 1163 of file `Doxyfile.in' has become obsolete.
         This tag has been removed.
warning: Tag `XML_DTD' at line 1169 of file `Doxyfile.in' has become obsolete.
         This tag has been removed.

Configuration file `Doxyfile.in' updated.