log unmapped HOST when pristine_host_hdr disabled

I want to log user request's "Host" in http header before remap. I write logs_xml.config, like: %<

cqh>

When proxy.config.url_remap.pristine_host_hdr is enabled, I will get the right "Host" which is not rewritten.

When disable the config, I always get the rewritten/mapped "Host" which is not what I need.

logs_xml reference: http://trafficserver.apache.org/docs/v2/admin/logfmts.htm#66912