fuel/fuel — comment on commit d2a997b592b5472145f2ff392e31f63ace62d07c
File:  line 0
By jschreuder:

There won't be any constants in the core for 2.0. Having said that, that won't stop you from adding your own and we'ĺl probably put the current constants in there for backwards compatibilty. The core won't use them anymore though. And that's the point in the end: add them yourself if you need them. It's not like it's much work.

I'm very much opposed to WEBROOT as it only muddies the water further. As @WanWizard pointed out already DOCROOT should by convention probably point to the actual docroot which is the webroot. Thus making this new constant only increase ambiguaty.