Add note about PrivacyManager to UPGRADE.txt

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@321332 65c4cc65-6c06-0410-ace0-fbb531ad65f3

UPGRADE.txt

@@ -50,5 +50,8 @@ pbx_lua:
  - the autoservice now defaults to being on by default
  - autoservice_start() and autoservice_start() no longer return a value.
 
+PrivacyManager:
+ - Removed unused options position since there are no more options defined.
+
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