Comment 5 for bug 1872540

Reviewed: https://review.opendev.org/720517
Committed: https://git.openstack.org/cgit/openstack/kolla-ansible/commit/?id=6450daba07256eb394930657d293ea6a6cb80ef6
Submitter: Zuul
Branch: stable/stein

commit 6450daba07256eb394930657d293ea6a6cb80ef6
Author: Jason Anderson <email address hidden>
Date: Mon Apr 13 15:06:00 2020 -0500

    [horizon] Move 'balance' HAProxy keyword

    The "balance" keyword is not valid in a frontend section. From the
    HAProxy documentation[1]:

    balance <algorithm> [ <arguments> ]
    balance url_param <param> [check_post [<max_wait>]]
      Define the load balancing algorithm to be used in a backend.
      May be used in sections : defaults | frontend | listen | backend
                                     yes | no | yes | yes

    When running HAProxy using the "split" template style, where a
    frontend/backend pair are used instead of one listen section, HAProxy
    will emit warnings for the Horizon config due to this.

    [1]: https://www.haproxy.org/download/1.5/doc/configuration.txt

    Closes-Bug: #1872540
    Change-Id: I91cee275d91a51944298618493f4ea0cd80282cc
    (cherry picked from commit 5c760df3d5f1886290b8dd86eb515acc06e66c9a)