Doxygen: upgrade doxygen.cfg.in file
Warning: Tag `XML_SCHEMA' at line 942 of file `doxygen.cfg' has become obsolete.
To avoid this warning please remove this line from your configuration file or upgrade it using "doxygen -u"
Warning: Tag `XML_DTD' at line 948 of file `doxygen.cfg' has become obsolete.
To avoid this warning please remove this line from your configuration file or upgrade it using "doxygen -u"
I upgrade the doxygen.cfg.in using: "doxygen -u doxygen.cfg.in"
The configuration file changed from Doxyfile 1.5.3 to Doxyfile 1.8.8