Disable Tk when making doc

[François Vogel]

Hi,

I've see the work today around disabling Tk when making doc.
I'm wondering what are the "issues when using Scilab through ssh". 
Could you please explain?

I'm asking because I think it's strange you apparently only need to 
disable Tk and not Tcl (that's what you did in the commits today). I 
suspect the problem could perhaps be better fixed in Tk, but I can't 
be sure since I don't know what's the problem exactly.

Also, I don't see a reason for keeping Tcl while disabling Tk. This is 
certainly unexpected. Using Tcl without Tk is not the usual assumption 
in Scilab. Even if this is only during make doc, overall there might 
be a better fix that would not need yet another environment variable 
to tune Tcl/Tk init.

Thanks for a few words of clarification.

Francois