Remove no needed return statements and cleanup examples.

Motivation:

We do not need to use return in the closures used in the examples.

Modifications:

- Remove return
- Remove bug where we set the same channel option two times in one example

Result:

Cleaner code.

Sources/NIO/Bootstrap.swift

@@ -25,8 +25,8 @@
 ///         // Set the handlers that are appled to the accepted child `Channel`s.
 ///         .childChannelInitializer { channel in
 ///             // Ensure we don't read faster then we can write by adding the BackPressureHandler into the pipeline.
-///             return channel.pipeline.add(handler: BackPressureHandler()).then { () in
-///                 return channel.pipeline.add(handler: MyChannelHandler())
+///             channel.pipeline.add(handler: BackPressureHandler()).then { () in
+///                 channel.pipeline.add(handler: MyChannelHandler())
 ///             }
 ///         }
 ///

Sources/NIOChatServer/main.swift

@@ -122,9 +122,9 @@ let bootstrap = ServerBootstrap(group: group)
     // Set the handlers that are appled to the accepted Channels
     .childChannelInitializer { channel in
         // Add handler that will buffer data until a \n is received
-        return channel.pipeline.add(handler: LineDelimiterCodec()).then { v in
+        channel.pipeline.add(handler: LineDelimiterCodec()).then { v in
             // Its important we use the same handler for all accepted channels. The ChatHandler is thread-safe!
-            return channel.pipeline.add(handler: chatHandler)
+            channel.pipeline.add(handler: chatHandler)
         }
     }
     

Sources/NIOEchoClient/main.swift

@@ -54,7 +54,6 @@ private final class EchoHandler: ChannelInboundHandler {
 
 let group = MultiThreadedEventLoopGroup(numThreads: 1)
 let bootstrap = ClientBootstrap(group: group)
-    .channelOption(ChannelOptions.socket(SocketOptionLevel(SOL_SOCKET), SO_REUSEADDR), value: 1)
     // Enable SO_REUSEADDR.
     .channelOption(ChannelOptions.socket(SocketOptionLevel(SOL_SOCKET), SO_REUSEADDR), value: 1)
     .channelInitializer { channel in

Sources/NIOEchoServer/main.swift

@@ -49,8 +49,8 @@ let bootstrap = ServerBootstrap(group: group)
     // Set the handlers that are appled to the accepted Channels
     .childChannelInitializer { channel in
         // Ensure we don't read faster then we can write by adding the BackPressureHandler into the pipeline.
-        return channel.pipeline.add(handler: BackPressureHandler()).then { v in
-            return channel.pipeline.add(handler: EchoHandler())
+        channel.pipeline.add(handler: BackPressureHandler()).then { v in
+            channel.pipeline.add(handler: EchoHandler())
         }
     }
 

Sources/NIOHTTP1Server/main.swift

@@ -395,8 +395,8 @@ let bootstrap = ServerBootstrap(group: group)
 
     // Set the handlers that are applied to the accepted Channels
     .childChannelInitializer { channel in
-        return channel.pipeline.addHTTPServerHandlers().then { _ in
-            return channel.pipeline.add(handler: HTTPHandler(fileIO: fileIO, htdocsPath: htdocs))
+        channel.pipeline.addHTTPServerHandlers().then { _ in
+            channel.pipeline.add(handler: HTTPHandler(fileIO: fileIO, htdocsPath: htdocs))
         }
     }