Fix X-UA-Device-force 
Fix X-UA-Device-force 

Change resp.response to resp.reason as this is passed to vcl_synth
Change set of  resp.response to resp.http.response (varnish 4)
Setting resp.status before using resp.reason resets resp.reason to "OK" and results in A-UA-Device-force cooking being set to "OK". Swap ordering to avoid this.
varnish/varnish-devicedetect,varnish/varnish-devicedetect