Correct SSL quiet shutdown comment.

Author: silvakid

cdk/foundation/connection_openssl.cc

@@ -273,12 +273,7 @@ class connection_TLS_impl
     if (m_tls)
     {
       /*
-      THE SSL standard says that SSL sockets must send and receive a close_notify
-      alert on socket shutdown to avoid truncation attacks. However, this can
-      cause problems since we often hold a lock during shutdown and this IO can
-      take an unbounded amount of time to complete. Since our packets are self
-      describing with length, we aren't vunerable to these attacks. Therefore,
-      we just shutdown by closing the socket (quiet shutdown).
+      Server is expecting a SSL quiet shutdown.
       */
       SSL_set_quiet_shutdown(m_tls, 1);
       SSL_shutdown(m_tls);