Inspect Server does not work with MHD channel type

[iheos]

The response messages do not have the Content-Location header. There is no FHIR-style location for an XDS object. The solution is to:

• add one that points at the proxy
• add a second header x-proxy-no-logging (new) that prevents logging of the transaction even though it travels through the proxy.

The MHD channel would set the Content-Location header on the response message pointing to the proxy (on the client side the content is FHIR so a Content-Location exists). Second, when server content is gathered supporting the Inspect Server function, the x-proxy-no-logging header would be added to all requests. These requests go to the proxy and this header keeps these requests from clogging the proxy event logs.