Can I set the "env" for the console?

[glasser]

We have a prod and a staging install of Druid. It would be nice when looking at the coordinator console to be able to tell which we're looking at. (The URL doesn't work because it seems to redirect to an IP-based URL.)

I see in the code that the big text "druid cluster" can include an "env" instead of the word cluster. But how do I configure my Druid coordinator to tell it the env name so that this works?