Update doxygen configuration file.
Update doxygen configuration file.

* doc/doxygen.conf:
  Run 'doxygen -u'.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion