I'm of two minds about that. On the one hand, logically it goes better there. On the other hand, this is the only place where we collect all the  environmental variables. In fact, there are probably others that I have not included simply because I didn't know they were there. So I somewhat prefer that all the checks stay in one place, so that it's clear at a glance what environmental variables are possible. I

( know in theory they should be documented in the help file, but in reality they're not and I am pessimistic that it will always be documented properly in the future.)