Change schedule priority of daemon/server in config

[OpenStack Infra]

https://review.openstack.org/238799
Dear bug triager. This bug was created since a commit was marked with DOCIMPACT.
Your project "openstack/swift" 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 ed772236c7289d178561ce014beb4879f726fc48
Author: Peter Lisák <email address hidden>
Date: Thu Oct 22 10:19:49 2015 +0200

    Change schedule priority of daemon/server in config

    The goal is to modify schedule priority and I/O scheduling class and
    priority of daemon/server via configuration.
    Setting is optional, default keeps current behaviour.

    Use case:
    Prioritize object-server to object-auditor, because all user's requests
    needed to be served in peak hours and audit could wait.

    Co-Authored-By: Clay Gerrard <email address hidden>
    DocImpact
    Change-Id: I1018a18f4706daabdb84574ffd9a58d831e68396

[Matthew Oliver (matt-0)]

The following change has been released and included in patch documentation.

https://review.openstack.org/#/c/238799/