Issue with math rendering in manual

[PierreMarion23]

The math (latex formulas with Mathjax) does not render when the manual is loaded in https, but it does render when the manual is loaded in http.

Example : https://umontreal-simul.github.io/latnetbuilder/d6/d4c/feats_figures.html
http://umontreal-simul.github.io/latnetbuilder/d6/d4c/feats_figures.html

It probably has to do with the Mathjax path specified in Doxyfile.in. The path starts with http whereas it should start with https.
MATHJAX_RELPATH = http://cdn.mathjax.org/mathjax/latest

Additionaly, cdn.mathjax.org should not be used, because this CDN has shutdown and the path is just a redirection of cdnjs.cloudflare.com, see https://www.mathjax.org/cdn-shutting-down/

[PierreMarion23]

Patched by changing URL from https to http in README (commit 7a416d3).

Root of the problem remains to be solved.