title: howto convert a Doxygen HTML documentation to .chm file
body: <p>I have a nearly ready Doxygen documentation, with dependence graphs, TOC, etc.
  How can I convert it to .chm?
  (Under Ubuntu 16.04 I installed HTML Help Workshop in a VirtualBox, and I think I can make .hhp (I do not have graphs, only placekeepers, no TOC, etc.)
  Shall I configure something extra? How .hhk and .hhc shall be generated?</p>