contrib/docker/UPGRADE

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Upgrade Notes for Docker 1.5.0
==============================
Docker 1.5.0 introduced several new features.
.. see:: http://docs.docker.com/release-notes/#version-150
As such several new Kernel configuration options
are **required**:
- ``CONFIG_CGROUP_FREEZER=y``
- ``CONFIG_CPUSETS=y``
- ``CONFIG_CGROUP_PERF=y``
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- ``CONFIG_POSIX_MQUEUE=y``
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Please make sure when you're upgrading your Docker engine
that you ensure these new Kernel configuration options
are enabled.