Comment 9 for bug 1842701

The new CSRF protection of the Balancer Manager breaks editing functionality for browsers that lowercase hostnames in the Referer: header; e.g. Chrome

The error is based on the usage of strcmp() in the safe_referer() function

https://github.com/apache/httpd/blob/2.4.x/modules/proxy/mod_proxy_balancer.c#L1107