Steps to reproduce the issue

Simple way to reproduce is to enable cloudflare flexissl without the website having it's own SSL certificate. You are then prompted with many SSL/non-ssl errors. Because we are asking the server for SSL Validation which is cannot provide.

Also this is an issue for hosts like TSOHost, which use the same header to reduce down time for sites which switch to SSL.

Expected result

To provide an SSL secured website which is validated.

Actual result

Either a redirect loop, if you enable Force SSL in the Joomla! Config.

Or insecure content warnings if just coming through https.

System information (as much as possible)

All Joomla! Versions

Additional comments