Use proxy_connect_module if we use https

While I can't (at the moment) read the log to verify the issue
(since the proxy tell me "error 500 go read the log", my
spidersenses tell me that could be the issue, and it can't hurt
to test on staging

roles/fedora-web/magazine/templates/fedoramagazine-web.conf

@@ -12,6 +12,7 @@ ProxyPass / http://209.132.184.52/
 ProxyPassReverse / http://209.132.184.52/
 {% else %}
 # In staging we point to the staging version of the magazine
+LoadModule proxy_connect_module modules/mod_proxy_connect.so
 ProxyPass / https://fedoramag.wpengine.com/
 ProxyPassReverse / https://fedoramag.wpengine.com/
 {% endif %}