Issue #847 - deprecate asyncWriteTimeout in the jetty websocket api

Signed-off-by: Lachlan Roberts <lachlan@webtide.com>

jetty-websocket/websocket-api/src/main/java/org/eclipse/jetty/websocket/api/WebSocketPolicy.java

@@ -188,6 +188,7 @@ public class WebSocketPolicy
      *
      * @return the timeout for async write operations. negative values indicate disabled timeout.
      */
+    @Deprecated
     public long getAsyncWriteTimeout()
     {
         return asyncWriteTimeout;

jetty-websocket/websocket-client/src/main/java/org/eclipse/jetty/websocket/client/WebSocketClient.java

@@ -427,6 +427,7 @@ public class WebSocketClient extends ContainerLifeCycle implements WebSocketCont
      *
      * @return number of milliseconds for timeout of an attempted write operation
      */
+    @Deprecated
     public long getAsyncWriteTimeout()
     {
         return getPolicy().getAsyncWriteTimeout();