Add support to incremental backups in cinder

[OpenStack Infra]

https://review.openstack.org/110068
commit e7f592df7b1a272255abd387150394a37a5c4da8
Author: Xing Yang <email address hidden>
Date: Mon Jan 12 14:16:28 2015 -0500

    Add support to incremental backups in cinder

    1. Added a new option to create backup to support incremental backups.
       New CLI option added for "cinder backup": --incremental or --incr
       By default, it is full backup.
       Add the following to API: 'incremental': True or False
       (False is the default)
    2. swift.py creates sha256file for every backup to calculate deltas

    DocImpact
    APIImpact
    Co-Authored-By: Xing Yang <email address hidden>
    Implements: blueprint incremental-backup
    Change-Id: I98f3765f7afa47bda6a8c7004f809c3cc4d1bd4b

[Tom Fifield (fifieldt)]

https://review.openstack.org/#/c/177199/

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/175576
Committed: https://git.openstack.org/cgit/openstack/openstack-manuals/commit/?id=83ee462ed75f44622b1a65effa126373a09a63a8
Submitter: Jenkins
Branch: master

commit 83ee462ed75f44622b1a65effa126373a09a63a8
Author: Xing Yang <email address hidden>
Date: Mon Apr 20 17:15:15 2015 -0400

    Incremental backup documentation

    Incremental backup support was added to Cinder in Kilo.
    This patch added documentation for it.

    Closes-Bug: 1429247

    Change-Id: I93a8dbb1bd26eb7d94eeaea62c333af33ddbba1e

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/openstack-manuals 15.0.0 release.