To avoid prospective occurrence of Bug 1656806, we need to do two small changes
in RHGS Web Administration Quick Start Guide:

* add note/point to 3.1. Prerequisites section[1] with content:
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  If httpd package is already installed on Web Administration server, please
  ensure that httpd service is stopped, before continuing with the installation
  process:
    # systemctl stop httpd
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

* in chapter "4.2. Red Hat Gluster Storage Web Administration 3.4.x to
  3.4.y"[2] - last step in section "On Web Administration Server:" reorder the
  list of restarted services, so that command:
    # systemctl restart httpd
  will be on the first place. So it will looks like this:
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  # systemctl restart httpd
  # systemctl restart tendrl-node-agent
  # systemctl restart tendrl-monitoring-integration
  # systemctl restart tendrl-notifier
  # systemctl restart tendrl-api
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

[1] https://access.redhat.com/documentation/en-us/red_hat_gluster_storage/3.4/html-single/quick_start_guide/#prerequisites
[2] https://access.redhat.com/documentation/en-us/red_hat_gluster_storage/3.4/html-single/quick_start_guide/#red_hat_gluster_storage_web_administration_3_4_x_to_3_4_y