474936 - WebSocketSessions are not always cleaned out from openSessions

+ Calling onSessionOpen() before App.onOpen()
  This helps, as there is a race for the onSessionOpen()
  in the original behavior with short lived sockets.
  The short lived socket could handle onSessionClosed()
  before onSessionOpen() had a chance, making the close
  fail to remove the session from openSessions, and then
  the slower add occurs later, adding it into the openSession
+ Minor cleanup in IOState

jetty-websocket/websocket-common/src/main/java/org/eclipse/jetty/websocket/common/WebSocketSession.java

@@ -400,12 +400,14 @@ public class WebSocketSession extends ContainerLifeCycle implements Session, Web
                 // confirmed close of local endpoint
                 notifyClose(close.getStatusCode(),close.getReason());
                 break;
-            case OPEN:
+            case CONNECTED:
                 // notify session listeners
                 for (SessionListener listener : sessionListeners)
                 {
                     try
                     {
+                        if (LOG.isDebugEnabled())
+                            LOG.debug("{}.onSessionOpen()", listener.getClass().getSimpleName());
                         listener.onSessionOpened(this);
                     }
                     catch (Throwable t)

jetty-websocket/websocket-common/src/main/java/org/eclipse/jetty/websocket/common/io/IOState.java

@@ -251,14 +251,15 @@ public class IOState
         {
             closeInfo = close;
             
+            // Turn off further output
+            outputAvailable = false;
+
             boolean in = inputAvailable;
             boolean out = outputAvailable;
             if (closeHandshakeSource == CloseHandshakeSource.NONE)
             {
                 closeHandshakeSource = CloseHandshakeSource.LOCAL;
             }
-            out = false;
-            outputAvailable = false;
             
             LOG.debug("onCloseLocal(), input={}, output={}",in,out);
 
@@ -320,14 +321,15 @@ public class IOState
 
             closeInfo = close;
             
+            // turn off further input
+            inputAvailable = false;
+
             boolean in = inputAvailable;
             boolean out = outputAvailable;
             if (closeHandshakeSource == CloseHandshakeSource.NONE)
             {
                 closeHandshakeSource = CloseHandshakeSource.REMOTE;
             }
-            in = false;
-            inputAvailable = false;
 
             if (LOG.isDebugEnabled())
                 LOG.debug("onCloseRemote(), input={}, output={}",in,out);