add more testdata examples

examples/reverse_proxy/h2o.conf

@@ -0,0 +1,9 @@
+listen:
+  port: 8080
+hosts:
+  "*":
+    paths:
+      /:
+        proxy.reverse.url: "http://localhost:8888"
+        proxy.preserve-host: ON
+        proxy.websocket: ON