How to set the supported image formats doesn't seem to be documented

[Stuart McLaren]

In glance/common/config.py default supported disk_formats are defined:

 image_format_opts = [
    cfg.ListOpt('container_formats',
                default=['ami', 'ari', 'aki', 'bare', 'ovf', 'ova'],
                help=_("Supported values for the 'container_format' "
                       "image attribute"),
                deprecated_opts=[cfg.DeprecatedOpt('container_formats',
                                                   group='DEFAULT')]),
    cfg.ListOpt('disk_formats',
                default=['ami', 'ari', 'aki', 'vhd', 'vmdk', 'raw', 'qcow2',
                         'vdi', 'iso'],
                help=_("Supported values for the 'disk_format' "
                       "image attribute"),
                deprecated_opts=[cfg.DeprecatedOpt('disk_formats',
                                                   group='DEFAULT')]),
 ]

But I can't see where we explain to users how to configure them.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/248748

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/248748
Committed: https://git.openstack.org/cgit/openstack/glance/commit/?id=b602ee3a9e3e4d523e9dcce1299bd69b5824106b
Submitter: Jenkins
Branch: master

commit b602ee3a9e3e4d523e9dcce1299bd69b5824106b
Author: Stuart McLaren <email address hidden>
Date: Mon Nov 23 14:55:58 2015 +0000

    Add documentation for configuring disk_formats

    Add documentation explaining how operators can add or remove supported
    disk_formats.

    Change-Id: I14f6c53506590e6fa373afdbdc3b6f052a0a532c
    Closes-bug: 1519006