net.httpserver: Reduce log level of 'request left open' message

net/httpserver.lua

@@ -105,7 +105,7 @@ local function call_callback(request, err)
 		if response then
 			if response == true and not request.destroyed then
 				-- Keep connection open, we will reply later
-				log("warn", "Request %s left open, on_destroy is %s", request.id, tostring(request.on_destroy));
+				log("debug", "Request %s left open, on_destroy is %s", request.id, tostring(request.on_destroy));
 			elseif response ~= true then
 				-- Assume response
 				send_response(request, response);