boot2docker/boot2docker-cli — pull request #273 by aanand (2014-10-13 13:59:25+00:00)
Title: Check all environment variables

Following discussion in #269.

If any of DOCKER_HOST, DOCKER_CERT_PATH or DOCKER_TLS_VERIFY are incorrect, `boot2docker up` will inform the user, and `boot2docker shellinit` will output the correct commands to set/unset them.