[Bug 1084232] Docker fails to pull images from behind a proxy server

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1084232

--- Comment #6 from Darryl Bond  ---
It will be still broken unless the environment file is added to the docker
package for the daemon startup.
Note Marcello (above) is starting the docker daemon manually rather than by
systemd.

I fixed it for my install by doing that indicated in the first post.
I imagine the docker package maintainer has to fix it for everyone.