Add release note

(cherry picked from commit 584e589d844968362fda7d52f6d0cee7ba36b7ea)

diff --git a/doc/arm/notes-9.11.27.xml b/doc/arm/notes-9.11.27.xml
index 6bbe29f27dfe65b0f73466e32d8881eb08b3c9a3..8a38dddcc63ff33c5a86cb57b610fa20039c1b03 100644 (file)
--- a/doc/arm/notes-9.11.27.xml
+++ b/doc/arm/notes-9.11.27.xml
@@ -65,7 +65,8 @@
     <itemizedlist>
       <listitem>
         <para>
-          None.
+          Prevent rbtdb instances being destroyed by multiple threads at the same
+          time. This can trigger assertion failures. [GL #2355]
         </para>
       </listitem>
     </itemizedlist>