I just realised that this awaited feature is now available. Great !
But, this is only by coming on this board, while installing a new Multiplus and thus checking the cccx manual that I found a reply to another question mentioning another cccx web server dedicated function. Then I tried to connect to the cccx ip on port 80 to find the console.
So here is the question : is this documented somewhere and how to be kept informed of new software feature.