elixir-lang/elixir — pull request #2580 by Joe-noh (2014-07-26 08:27:51+00:00)
Title: [MIX] allow lowercase http(s)_proxy env var

Hi all.

I noticed that `Mix.Utils.read_url/1` considers only uppercase environment variable `HTTP(S)_PROXY`.
No reason to ignore `http(s)_proxy` comes in my mind and I guess lowercase version of them are pretty common.

thanks.