http server accepts factory of HttpHandlers

guide/src/qs_2.md

@@ -55,10 +55,10 @@ request handler with the application's `resource` on a particular *HTTP method*
 ```
 
 After that, application instance can be used with `HttpServer` to listen for incoming
-connections:
+connections. Server accepts function that should return `HttpHandler` instance:
 
 ```rust,ignore
-   HttpServer::new(app).serve::<_, ()>("127.0.0.1:8088");
+   HttpServer::new(|| app).serve::<_, ()>("127.0.0.1:8088");
 ```
 
 That's it. Now, compile and run the program with cargo run. 
@@ -79,7 +79,7 @@ fn main() {
     let sys = actix::System::new("example");
 
     HttpServer::new(
-        Application::new()
+        || Application::new()
             .resource("/", |r| r.f(index)))
         .serve::<_, ()>("127.0.0.1:8088").unwrap();
 

guide/src/qs_3.md

@@ -42,7 +42,7 @@ Multiple applications could be served with one server:
 use actix_web::*;
 
 fn main() {
-    HttpServer::<TcpStream, SocketAddr, _>::new(vec![
+    HttpServer::<TcpStream, SocketAddr, _>::new(|| vec![
         Application::new()
             .prefix("/app1")
             .resource("/", |r| r.f(|r| httpcodes::HTTPOk)),

guide/src/qs_4.md

@@ -81,7 +81,7 @@ fn main() {
     let sys = actix::System::new("example");
 
     HttpServer::new(
-        Application::new()
+        || Application::new()
             .resource("/", |r| r.method(Method::GET).f(index)))
         .serve::<_, ()>("127.0.0.1:8088").unwrap();