WHATSNEW: Add release notes for Samba 4.9.9

CVE-2019-12435 rpc/dns: avoid NULL deference if zone not found in DnssrvOperation2
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13922

Signed-off-by: Karolin Seeger <kseeger@samba.org>

WHATSNEW.txt

@@ -1,3 +1,56 @@
+                   =============================
+                   Release Notes for Samba 4.9.9
+                            June 19, 2019
+                   =============================
+
+
+This is a security release in order to address the following defect:
+
+o  CVE-2019-12435 (Samba AD DC Denial of Service in DNS management server       
+                  (dnsserver))
+
+=======
+Details
+=======
+
+o  CVE-2019-12435:                                                              
+   An authenticated user can crash the Samba AD DC's RPC server process via a   
+   NULL pointer dereference.
+
+For more details and workarounds, please refer to the security advisory.
+
+
+Changes since 4.9.8:
+--------------------
+
+o  Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
+   * BUG 13922: CVE-2019-12435 rpc/dns: Avoid NULL deference if zone not found
+     in DnssrvOperation2.
+
+
+#######################################
+Reporting bugs & Development Discussion
+#######################################
+
+Please discuss this release on the samba-technical mailing list or by
+joining the #samba-technical IRC channel on irc.freenode.net.
+
+If you do report problems then please try to send high quality
+feedback. If you don't provide vital information to help us track down
+the problem then you will probably be ignored.  All bug reports should
+be filed under the "Samba 4.1 and newer" product in the project's Bugzilla
+database (https://bugzilla.samba.org/).
+
+
+======================================================================
+== Our Code, Our Bugs, Our Responsibility.
+== The Samba Team
+======================================================================
+
+
+Release notes for older releases follow:
+----------------------------------------
+
                    =============================
                    Release Notes for Samba 4.9.8
                             May 14, 2019
@@ -49,8 +102,8 @@ database (https://bugzilla.samba.org/).
 ======================================================================
 
 
-Release notes for older releases follow:
+----------------------------------------------------------------------
-----------------------------------------
+
 
                    =============================
                    Release Notes for Samba 4.9.7