Use new maintainer to/from variables

templates/katie.announce

-From: __MAINTAINER_ADDRESS__
+From: __MAINTAINER_FROM__
 To: __ANNOUNCE_LIST_ADDRESS__
 __BCC__
 Subject: Installed __SOURCE__ __VERSION__ (__ARCHITECTURE__)

templates/katie.bug-close

-From: __MAINTAINER_ADDRESS__
+From: __MAINTAINER_FROM__
 To: __BUG_NUMBER__-close@__BUG_SERVER__
 __BCC__
 Subject: Bug#__BUG_NUMBER__: fixed in __SOURCE__ __VERSION__

templates/katie.bug-nmu-fixed

-From: __MAINTAINER_ADDRESS__
+From: __MAINTAINER_FROM__
 To: control@__BUG_SERVER__
-Cc: __MAINTAINER_ADDRESS__
+Cc: __MAINTAINER_TO__
 __BCC__
 Subject: Fixed in NMU of __SOURCE__ __VERSION__
 

templates/katie.installed

 From: __KATIE_ADDRESS__
-To: __MAINTAINER_ADDRESS__
+To: __MAINTAINER_TO__
 __BCC__
 Subject: __CHANGES_FILENAME__ INSTALLED__SUITE__
 

templates/katie.new

 From: __KATIE_ADDRESS__
-To: __MAINTAINER_ADDRESS__
+To: __MAINTAINER_TO__
 __BCC__
 Subject: __CHANGES_FILENAME__ is NEW
 

templates/katie.override-disparity

 From: __KATIE_ADDRESS__
-To: __MAINTAINER_ADDRESS__
+To: __MAINTAINER_TO__
 __BCC__
 Subject: __SOURCE__ override disparity
 

templates/katie.rejected

 From: __KATIE_ADDRESS__
-To: __MAINTAINER_ADDRESS__
+To: __MAINTAINER_TO__
+__CC__
 __BCC__
 Subject: __CHANGES_FILENAME__ REJECTED