Added CMS_RESPONSE.request_url (...)

Update a few callers of CMS_RESPONSE.url (...).
Renamed the demo files using "server" instead of "demo".

examples/demo/server.ini

@@ -0,0 +1,9 @@
+port=9090
+#port=12345
+verbose=true
+socket_timeout=60
+socket_recv_timeout=45
+keep_alive_timeout=25
+ssl_enabled=false
+ssl_ca_key=server.key
+ssl_ca_crt=server.crt