in TlsActor flush data to user only after handshake has finished (#1128)

Co-authored-by: Johannes Rudolph <[email protected]>

stream/src/main/scala/org/apache/pekko/stream/impl/io/TLSActor.scala

@@ -420,7 +420,6 @@ import pekko.util.ByteString
       case OK =>
         result.getHandshakeStatus match {
           case NEED_WRAP =>
-            flushToUser()
             // https://github.com/apache/incubator-pekko/issues/442
             // A second workaround for an infinite loop we have not been able to reproduce/isolate,
             // if you see this, and can reproduce consistently, please report back to the Apache Pekko team
@@ -480,6 +479,7 @@ import pekko.util.ByteString
       case Success(()) =>
         currentSession = session
         corkUser = false
+        flushToUser()
       case Failure(ex) =>
         fail(ex, closeTransport = true)
     }