hashicorp/serf — pull request #143 by mcroydon (2014-02-21 22:27:10+00:00)
Title: Copy cmd.Env fron os.Environ() to inherit from the OS environment. Fixes...

Based on a quick test of echoing an exported environment variable, this approach works. If cmd.Env was never overwritten, the OS environment would have passed through. Still thinking about ways to properly test this change.