com.sun.net.HttpsServer spins on TLS session close

The server spins sometimes (a lot on slow or underpowered servers) in SSLStreams::doClosure.

diff --git a/src/jdk.httpserver/share/classes/sun/net/httpserver/SSLStreams.java b/src/jdk.httpserver/share/classes/sun/net/httpserver/SSLStreams.java
index 6e362d07aa4..7b44275b78f 100644
--- a/src/jdk.httpserver/share/classes/sun/net/httpserver/SSLStreams.java
+++ b/src/jdk.httpserver/share/classes/sun/net/httpserver/SSLStreams.java
@@ -430,11 +430,17 @@ class SSLStreams {
             handshaking.lock();
             ByteBuffer tmp = allocate(BufType.APPLICATION);
             WrapperResult r;
+ Status st;
+ HandshakeStatus hs;
             do {
                 tmp.clear();
                 tmp.flip ();
                 r = wrapper.wrapAndSendX (tmp, true);
- } while (r.result.getStatus() != Status.CLOSED);
+ hs = r.result.getHandshakeStatus();
+ st = r.result.getStatus();
+ } while (st != Status.CLOSED &&
+ !(st == Status.OK
+ && hs == HandshakeStatus.NOT_HANDSHAKING));
         } finally {
             handshaking.unlock();
         }