aws/aws-sdk-ruby — pull request #519 by kadwanev (2014-04-15 15:00:52+00:00)
Title: Configure from current ENV variable names: AWS_ACCESS_KEY / AWS_SECRET_KEY

http://docs.aws.amazon.com/AWSEC2/latest/CommandLineReference/set-up-ec2-cli-linux.html

Current standard ENV variables are AWS_ACCESS_KEY / AWS_SECRET_KEY. Adding support to read those while keeping backward compatibility for all previous values.