Update SSLSocketChannel2.java

'handshakeStartTime' long variable is added and isHandShakeComplete()  function is updated for TooTallNate#896.

If wss handshake is not completed in 10s, close this channel to prevent cpu overload or unexpected channel error. See TooTallNate#896.

Author: sahnjeok

src/main/java/org/java_websocket/SSLSocketChannel2.java

@@ -409,7 +409,7 @@ private boolean isHandShakeComplete() {
       // 2022-06-17 If wss handshake is not completed in 10s, close this channel to prevent cpu overload or unexpected channel error. see #896.
       if ( handshakeStartTime > 0 && ( System.currentTimeMillis() - handshakeStartTime ) > 10000 )
       {
-        try{close() ;}catch(Exception ex){} ;
+        try{close() ;}catch(IOException ex){} ;
       }
     }