Document changes and release 1:91.2.0-1

debian/changelog

+thunderbird (1:91.2.0-1) experimental; urgency=medium
+
+  * [3c88844] New upstream version 91.2.0
+    Fixed CVE issues in upstream version 91.2 (MFSA 2021-47):
+    CVE-2021-38502: Downgrade attack on SMTP STARTTLS connections
+    CVE-2021-38496: Use-after-free in MessageTask
+    CVE-2021-38497: Validation message could have been overlaid on another
+                    origin
+    CVE-2021-38498: Use-after-free of nsLanguageAtomService object
+    CVE-2021-32810: Data race in crossbeam-deque
+    CVE-2021-38500: Memory safety bugs fixed in Thunderbird 91.2
+    CVE-2021-38501: Memory safety bugs fixed in Thunderbird 91.2
+    (Closes: #973042)
+
+ -- Carsten Schoenert <c.schoenert@t-online.de>  Sat, 16 Oct 2021 08:27:55 +0200
+
 thunderbird (1:91.1.1-1) experimental; urgency=medium
 
   * [73e3b75] New upstream version 91.1.1