Updated openstack/openstack
Project: openstack-dev/devstack  9d229e499ed34a736e281f299211ea984aaed814

Better "exec 3>&1" comment

"Copy stdout to fd 3" is confusing. Explain the intention behind `exec 3>&1`.

Change-Id: Id19434121876e65a14c709beac26b9daf4a36a0a