Use X-REQUEST-ID for Error pages

view/templates/exception.tpl

@@ -7,6 +7,9 @@
 {{$stack_trace}}
 {{$trace}}</pre>
 {{/if}}
+{{if $request_id}}
+	<pre>Request: {{$request_id}}</pre>
+{{/if}}
 {{if $back}}
 	<p><button type="button" onclick="window.history.back()" class="btn btn-primary">{{$back}}</button></p>
 {{/if}}

view/templates/http_status.tpl

@@ -8,5 +8,8 @@
 	{{if $trace}}
 		<pre>{{$trace nofilter}}</pre>
 	{{/if}}
+	{{if $request_id}}
+		<pre>Request: {{$request_id}}</pre>
+	{{/if}}
 	</body>
 </html>