diff --git a/actix-codec/src/lib.rs b/actix-codec/src/lib.rs
index 48028d8b..24628e79 100644
--- a/actix-codec/src/lib.rs
+++ b/actix-codec/src/lib.rs
@@ -9,8 +9,10 @@
 //! [`Sink`]: futures_sink::Sink
 //! [`Stream`]: futures_core::Stream
 
-#![deny(rust_2018_idioms)]
+#![deny(rust_2018_idioms, nonstandard_style)]
 #![warn(missing_docs)]
+#![doc(html_logo_url = "https://actix.rs/img/logo.png")]
+#![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
 
 mod bcodec;
 mod framed;
diff --git a/actix-connect/src/lib.rs b/actix-connect/src/lib.rs
index 127f0a16..65e88f9a 100644
--- a/actix-connect/src/lib.rs
+++ b/actix-connect/src/lib.rs
@@ -5,8 +5,10 @@
 //! * `openssl` - enables TLS support via `openssl` crate
 //! * `rustls` - enables TLS support via `rustls` crate
 
-#![deny(rust_2018_idioms)]
+#![deny(rust_2018_idioms, nonstandard_style)]
 #![recursion_limit = "128"]
+#![doc(html_logo_url = "https://actix.rs/img/logo.png")]
+#![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
 
 #[macro_use]
 extern crate log;
diff --git a/actix-macros/src/lib.rs b/actix-macros/src/lib.rs
index e4baa15b..fc655a64 100644
--- a/actix-macros/src/lib.rs
+++ b/actix-macros/src/lib.rs
@@ -1,5 +1,8 @@
 //! Macros for use with Tokio
-extern crate proc_macro;
+
+#![deny(rust_2018_idioms, nonstandard_style)]
+#![doc(html_logo_url = "https://actix.rs/img/logo.png")]
+#![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
 
 use proc_macro::TokenStream;
 use quote::quote;
diff --git a/actix-rt/src/lib.rs b/actix-rt/src/lib.rs
index 420e1aeb..4b0fde9f 100644
--- a/actix-rt/src/lib.rs
+++ b/actix-rt/src/lib.rs
@@ -1,5 +1,8 @@
 //! A runtime implementation that runs everything on the current thread.
-#![forbid(unsafe_code)]
+#![deny(rust_2018_idioms, nonstandard_style)]
+#![allow(clippy::type_complexity)]
+#![doc(html_logo_url = "https://actix.rs/img/logo.png")]
+#![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
 
 #[cfg(not(test))] // Work around for rust-lang/rust#62127
 pub use actix_macros::{main, test};
diff --git a/actix-server/CHANGES.md b/actix-server/CHANGES.md
index 19cd711a..98d55e82 100644
--- a/actix-server/CHANGES.md
+++ b/actix-server/CHANGES.md
@@ -9,6 +9,10 @@
 * Convert `mio::net::TcpStream` to `actix_rt::net::TcpStream`(`UnixStream` for uds) using `FromRawFd` and `IntoRawFd`(`FromRawSocket` and `IntoRawSocket` on windows).
 * Remove `AsyncRead` and `AsyncWrite` trait bound for `socket::FromStream` trait. 
 * Added explicit info log message on accept queue pause. [#215]
+* Prevent double registration of sockets when back-pressure is resolved. [#223]
+
+[#215]: https://github.com/actix/actix-net/pull/215
+[#223]: https://github.com/actix/actix-net/pull/223
 
 [#215]: https://github.com/actix/actix-net/pull/215
 
diff --git a/actix-server/src/config.rs b/actix-server/src/config.rs
index cda21b74..4133a984 100644
--- a/actix-server/src/config.rs
+++ b/actix-server/src/config.rs
@@ -9,10 +9,8 @@ use futures_util::future::ready;
 use log::error;
 
 use crate::builder::bind_addr;
-use crate::service::{
-    BoxedServerService, InternalServiceFactory, ServerMessage, StreamService,
-};
-use crate::socket::{MioTcpListener, StdSocketAddr, StdTcpListener, ToSocketAddrs};
+use crate::service::{BoxedServerService, InternalServiceFactory, StreamService};
+use crate::socket::{MioStream, MioTcpListener, StdSocketAddr, StdTcpListener, ToSocketAddrs};
 use crate::LocalBoxFuture;
 use crate::Token;
 
@@ -245,7 +243,7 @@ impl ServiceRuntime {
 
 type BoxedNewService = Box<
     dyn actix::ServiceFactory<
-        Request = (Option<CounterGuard>, ServerMessage),
+        Request = (Option<CounterGuard>, MioStream),
         Response = (),
         Error = (),
         InitError = (),
@@ -267,7 +265,7 @@ where
     T::Error: 'static,
     T::InitError: fmt::Debug + 'static,
 {
-    type Request = (Option<CounterGuard>, ServerMessage);
+    type Request = (Option<CounterGuard>, MioStream);
     type Response = ();
     type Error = ();
     type Config = ();
diff --git a/actix-server/src/lib.rs b/actix-server/src/lib.rs
index c696baff..1bccfa29 100644
--- a/actix-server/src/lib.rs
+++ b/actix-server/src/lib.rs
@@ -1,6 +1,8 @@
 //! General purpose TCP server.
 
-#![deny(rust_2018_idioms)]
+#![deny(rust_2018_idioms, nonstandard_style)]
+#![doc(html_logo_url = "https://actix.rs/img/logo.png")]
+#![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
 
 mod accept;
 mod builder;
diff --git a/actix-server/src/service.rs b/actix-server/src/service.rs
index ca2a7c64..8ebe36a2 100644
--- a/actix-server/src/service.rs
+++ b/actix-server/src/service.rs
@@ -1,7 +1,6 @@
 use std::marker::PhantomData;
 use std::net::SocketAddr;
 use std::task::{Context, Poll};
-use std::time::Duration;
 
 use actix_service::{self as actix, Service, ServiceFactory as ActixServiceFactory};
 use actix_utils::counter::CounterGuard;
@@ -12,18 +11,6 @@ use crate::socket::{FromStream, MioStream};
 use crate::LocalBoxFuture;
 use crate::Token;
 
-/// Server message
-pub(crate) enum ServerMessage {
-    /// New stream
-    Connect(MioStream),
-
-    /// Gracefully shutdown
-    Shutdown(Duration),
-
-    /// Force shutdown
-    ForceShutdown,
-}
-
 pub trait ServiceFactory<Stream: FromStream>: Send + Clone + 'static {
     type Factory: actix::ServiceFactory<Config = (), Request = Stream>;
 
@@ -40,7 +27,7 @@ pub(crate) trait InternalServiceFactory: Send {
 
 pub(crate) type BoxedServerService = Box<
     dyn Service<
-        Request = (Option<CounterGuard>, ServerMessage),
+        Request = (Option<CounterGuard>, MioStream),
         Response = (),
         Error = (),
         Future = Ready<Result<(), ()>>,
@@ -64,7 +51,7 @@ where
     T::Error: 'static,
     I: FromStream,
 {
-    type Request = (Option<CounterGuard>, ServerMessage);
+    type Request = (Option<CounterGuard>, MioStream);
     type Response = ();
     type Error = ();
     type Future = Ready<Result<(), ()>>;
@@ -73,21 +60,21 @@ where
         self.service.poll_ready(ctx).map_err(|_| ())
     }
 
-    fn call(&mut self, (guard, req): (Option<CounterGuard>, ServerMessage)) -> Self::Future {
-        if let ServerMessage::Connect(stream) = req {
-            match FromStream::from_mio(stream) {
-                Ok(stream) => {
-                    let f = self.service.call(stream);
-                    actix_rt::spawn(async move {
-                        let _ = f.await;
-                        drop(guard);
-                    });
-                }
-                Err(e) => error!("Can not convert to an async tcp stream: {}", e),
-            };
-        }
-
-        ready(Ok(()))
+    fn call(&mut self, (guard, req): (Option<CounterGuard>, MioStream)) -> Self::Future {
+        match FromStream::from_mio(stream) {
+            Ok(stream) => {
+                let f = self.service.call(stream);
+                actix_rt::spawn(async move {
+                  let _ = f.await;
+                  drop(guard);
+                });
+                ready(Ok(()))
+            }
+            Err(e) => { 
+              error!("Can not convert to an async tcp stream: {}", e);
+                ready(Err(()))
+            }
+        };
     }
 }
 
@@ -154,20 +141,6 @@ where
     }
 }
 
-impl InternalServiceFactory for Box<dyn InternalServiceFactory> {
-    fn name(&self, token: Token) -> &str {
-        self.as_ref().name(token)
-    }
-
-    fn clone_factory(&self) -> Box<dyn InternalServiceFactory> {
-        self.as_ref().clone_factory()
-    }
-
-    fn create(&self) -> LocalBoxFuture<'static, Result<Vec<(Token, BoxedServerService)>, ()>> {
-        self.as_ref().create()
-    }
-}
-
 impl<F, T, I> ServiceFactory<I> for F
 where
     F: Fn() -> T + Send + Clone + 'static,
diff --git a/actix-server/src/worker.rs b/actix-server/src/worker.rs
index 1c8baf8c..298c8048 100644
--- a/actix-server/src/worker.rs
+++ b/actix-server/src/worker.rs
@@ -15,7 +15,7 @@ use futures_util::stream::Stream;
 use futures_util::TryFutureExt;
 use log::{error, info, trace};
 
-use crate::service::{BoxedServerService, InternalServiceFactory, ServerMessage};
+use crate::service::{BoxedServerService, InternalServiceFactory};
 use crate::socket::{MioStream, SocketAddr};
 use crate::waker_queue::{WakerInterest, WakerQueue};
 use crate::LocalBoxFuture;
@@ -233,21 +233,12 @@ impl Worker {
             self.services.iter_mut().for_each(|srv| {
                 if srv.status == WorkerServiceStatus::Available {
                     srv.status = WorkerServiceStatus::Stopped;
-                    let fut = srv.service.call((None, ServerMessage::ForceShutdown));
-                    spawn(async {
-                        let _ = fut.await;
-                    });
                 }
             });
         } else {
-            let timeout = self.shutdown_timeout;
             self.services.iter_mut().for_each(move |srv| {
                 if srv.status == WorkerServiceStatus::Available {
                     srv.status = WorkerServiceStatus::Stopping;
-                    let fut = srv.service.call((None, ServerMessage::Shutdown(timeout)));
-                    spawn(async {
-                        let _ = fut.await;
-                    });
                 }
             });
         }
@@ -443,7 +434,7 @@ impl Future for Worker {
                         let guard = self.conns.get();
                         let _ = self.services[msg.token.0]
                             .service
-                            .call((Some(guard), ServerMessage::Connect(msg.io)));
+                            .call((Some(guard), msg.io));
                     }
                     Poll::Pending => return Poll::Pending,
                     Poll::Ready(None) => return Poll::Ready(()),
diff --git a/actix-service/src/lib.rs b/actix-service/src/lib.rs
index fd09184c..b25a6f98 100644
--- a/actix-service/src/lib.rs
+++ b/actix-service/src/lib.rs
@@ -1,7 +1,9 @@
 //! See [`Service`](trait.Service.html) docs for information on this crate's foundational trait.
 
-#![deny(rust_2018_idioms, warnings)]
+#![deny(rust_2018_idioms, nonstandard_style)]
 #![allow(clippy::type_complexity)]
+#![doc(html_logo_url = "https://actix.rs/img/logo.png")]
+#![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
 
 use std::cell::RefCell;
 use std::future::Future;
diff --git a/actix-testing/src/lib.rs b/actix-testing/src/lib.rs
index 3ec81061..efcdd394 100644
--- a/actix-testing/src/lib.rs
+++ b/actix-testing/src/lib.rs
@@ -1,6 +1,9 @@
 //! Various helpers for Actix applications to use during testing.
-#![deny(rust_2018_idioms, warnings)]
+
+#![deny(rust_2018_idioms, nonstandard_style)]
 #![allow(clippy::type_complexity, clippy::needless_doctest_main)]
+#![doc(html_logo_url = "https://actix.rs/img/logo.png")]
+#![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
 
 use std::sync::mpsc;
 use std::{net, thread};
diff --git a/actix-threadpool/src/lib.rs b/actix-threadpool/src/lib.rs
index 08b563ef..2fda28ef 100644
--- a/actix-threadpool/src/lib.rs
+++ b/actix-threadpool/src/lib.rs
@@ -1,5 +1,9 @@
 //! Thread pool for blocking operations
 
+#![deny(rust_2018_idioms, nonstandard_style)]
+#![doc(html_logo_url = "https://actix.rs/img/logo.png")]
+#![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
+
 use std::fmt;
 use std::future::Future;
 use std::pin::Pin;
diff --git a/actix-tls/src/lib.rs b/actix-tls/src/lib.rs
index 5613c5f2..8cc18046 100644
--- a/actix-tls/src/lib.rs
+++ b/actix-tls/src/lib.rs
@@ -5,7 +5,9 @@
 //! * `rustls` - TLS acceptor using the `rustls` crate.
 //! * `nativetls` - TLS acceptor using the `native-tls` crate.
 
-#![deny(rust_2018_idioms)]
+#![deny(rust_2018_idioms, nonstandard_style)]
+#![doc(html_logo_url = "https://actix.rs/img/logo.png")]
+#![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
 
 use std::sync::atomic::{AtomicUsize, Ordering};
 
diff --git a/actix-tracing/src/lib.rs b/actix-tracing/src/lib.rs
index 35c85286..c011790b 100644
--- a/actix-tracing/src/lib.rs
+++ b/actix-tracing/src/lib.rs
@@ -1,5 +1,8 @@
 //! Actix tracing - support for tokio tracing with Actix services.
-#![deny(rust_2018_idioms, warnings)]
+
+#![deny(rust_2018_idioms, nonstandard_style)]
+#![doc(html_logo_url = "https://actix.rs/img/logo.png")]
+#![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
 
 use std::marker::PhantomData;
 use std::task::{Context, Poll};
diff --git a/actix-utils/src/lib.rs b/actix-utils/src/lib.rs
index 7fde1f59..19df225b 100644
--- a/actix-utils/src/lib.rs
+++ b/actix-utils/src/lib.rs
@@ -1,7 +1,9 @@
 //! Actix utils - various helper services
 
-#![deny(rust_2018_idioms)]
+#![deny(rust_2018_idioms, nonstandard_style)]
 #![allow(clippy::type_complexity)]
+#![doc(html_logo_url = "https://actix.rs/img/logo.png")]
+#![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
 
 pub mod condition;
 pub mod counter;
diff --git a/router/src/de.rs b/router/src/de.rs
index ce29d2af..81796348 100644
--- a/router/src/de.rs
+++ b/router/src/de.rs
@@ -42,7 +42,7 @@ macro_rules! parse_single_value {
     };
 }
 
-pub struct PathDeserializer<'de, T: ResourcePath + 'de> {
+pub struct PathDeserializer<'de, T: ResourcePath> {
     path: &'de Path<T>,
 }
 
diff --git a/router/src/lib.rs b/router/src/lib.rs
index e141d667..5850b103 100644
--- a/router/src/lib.rs
+++ b/router/src/lib.rs
@@ -1,5 +1,9 @@
 //! Resource path matching library.
 
+#![deny(rust_2018_idioms, nonstandard_style)]
+#![doc(html_logo_url = "https://actix.rs/img/logo.png")]
+#![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
+
 mod de;
 mod path;
 mod resource;
diff --git a/router/src/path.rs b/router/src/path.rs
index 0e13c37a..0998c614 100644
--- a/router/src/path.rs
+++ b/router/src/path.rs
@@ -158,7 +158,7 @@ impl<T: ResourcePath> Path<T> {
     }
 
     /// Return iterator to items in parameter container
-    pub fn iter(&self) -> PathIter<T> {
+    pub fn iter(&self) -> PathIter<'_, T> {
         PathIter {
             idx: 0,
             params: self,
diff --git a/string/src/lib.rs b/string/src/lib.rs
index dd89399b..553c8634 100644
--- a/string/src/lib.rs
+++ b/string/src/lib.rs
@@ -1,5 +1,9 @@
 //! A UTF-8 encoded read-only string using Bytes as storage.
 
+#![deny(rust_2018_idioms, nonstandard_style)]
+#![doc(html_logo_url = "https://actix.rs/img/logo.png")]
+#![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
+
 use std::convert::TryFrom;
 use std::{borrow, fmt, hash, ops, str};
 
@@ -156,13 +160,13 @@ macro_rules! array_impls {
 array_impls!(0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16);
 
 impl fmt::Debug for ByteString {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
         (**self).fmt(fmt)
     }
 }
 
 impl fmt::Display for ByteString {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
         (**self).fmt(fmt)
     }
 }