Description of problem:
Backport of fix needed for glance from newton to OSP 8

https://review.openstack.org/#/c/294681/2
https://review.openstack.org/#/c/294681/2/glance/common/wsgi.py
User uses some external vendor's tool that curls the endpoints and uses that to establish a connection?
Missing a the following configuration in /etc/haproxy/haproxy.cfg
~~~~~~~
listen glance_api
  bind 10.0.0.4:13292 transparent ssl crt /etc/pki/tls/private/overcloud_endpoint.pem
  bind 172.18.0.10:9292 transparent
  mode http
  http-request set-header X-Forwarded-Proto https if { ssl_fc }
  http-request set-header X-Forwarded-Proto http if !{ ssl_fc }
  server overcloud-controller-0 172.18.0.11:9292 check fall 5 inter 2000 rise 2
~~~~~~~~

Version-Release number of selected component (if applicable):


How reproducible:
Install openstack with multiple controllers 

Steps to Reproduce:
1.
2.
3.

Actual results:


Expected results:


Additional info: