Allow debug params X-CS and X-SUBDOMAIN in URL

* Having X-CS in URL overrides the X-CS header and ignores
the 'enabled' parameter of the zero configuration
* Having X-SUBDOMAIN in URL overrides header with the same name

Change-Id: Ifc869adea24f3b9d27918557ac7fa954e406c7d0
Merge "Allow debug params X-CS and X-SUBDOMAIN in URL"