Pick up proxy buildargs from environment

[OpenStack Infra]

https://review.openstack.org/267491
Dear bug triager. This bug was created since a commit was marked with DOCIMPACT.
Your project "openstack/kolla" is set up so that we directly report the documentation bugs against it. If this needs changing, the docimpact-group option needs to be added for the project. You can ask the OpenStack infra team (#openstack-infra on freenode) for help if you need to.

commit b82111d589cf3f82cbe115d002b29eee959a428f
Author: Paul Bourke <email address hidden>
Date: Thu Jan 14 11:41:35 2016 +0000

    Pick up proxy buildargs from environment

    We currently support any buildarg via --build-args. This patch picks up
    the default supported proxy buildargs if set in the user's environment,
    to allow for more transparent proxy support.

    The --build-args will take precendence.

    DocImpact
    Implements blueprint: better-proxy-support

    Change-Id: I084e5d1cc8f9993d65167878f9983ad58a68e86e

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/289264

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/289264
Committed: https://git.openstack.org/cgit/openstack/kolla/commit/?id=c0d7abc53221494ac6842627621679f6cea2930c
Submitter: Jenkins
Branch: master

commit c0d7abc53221494ac6842627621679f6cea2930c
Author: Rodolfo Alonso <email address hidden>
Date: Mon Mar 7 10:59:44 2016 +0000

    Add documentation for proxy buildargs picked from the environment.

    Add documentation for the commit I084e5d1cc8f9993d65167878f9983ad58a68e86e.
    Explain how 'build.py' picks up automatically env proxy variables.

    Change-Id: Ia8513babd4ff72ed52e167b361d6b54393598a78
    Closes-Bug: #1538108