dapper to gutsy(+1): mozilla transition tweaks needed

mozilla suite has been removed from archive in feisty. in gutsy and later there will be iceape as a replacement. We should tweak the update-manager to smoothen transition.

list of transition packages taken from debian etch:

+Package: mozilla
+Architecture: all
+Section: web
+Depends: iceape
+Description: Transition package for the Iceape Internet Suite
+ Package to ease upgrading from mozilla packages to the new iceape package.
+ .
+ This package can be purged at anytime once the iceape package has been
+ installed.
+
+Package: mozilla-browser
+Architecture: all
+Section: web
+Depends: iceape-browser
+Description: Transition package for Iceape Navigator and Composer
+ Package to ease upgrading from mozilla packages to the new iceape package.
+ .
+ This package can be purged at anytime once the iceape-browser package has
+ been installed.
+
+Package: mozilla-dev
+Architecture: all
+Section: devel
+Depends: iceape-dev
+Description: Transition package for development file for the Iceape Internet Suite
+ Package to ease upgrading from mozilla packages to the new iceape package.
+ .
+ This package can be purged at anytime once the iceape-dev package has been
+ installed.
+
+Package: mozilla-mailnews
+Architecture: all
+Section: mail
+Depends: iceape-mailnews
+Description: Transition package for Iceape Mail & Newsgroups and Address Book
+ Package to ease upgrading from mozilla packages to the new iceape package.
+ .
+ This package can be purged at anytime once the iceape-mailnews package has
+ been installed.
+
+Package: mozilla-chatzilla
+Architecture: all
+Section: net
+Depends: iceape-chatzilla
+Description: Transition package for Iceape Chatzilla IRC client
+ Package to ease upgrading from mozilla packages to the new iceape package.
+ .
+ This package can be purged at anytime once the iceape-chatzilla package
+ has been installed.
+
+Package: mozilla-psm
+Architecture: all
+Section: web
+Depends: iceape-browser
+Description: Transition package for Iceape Navigator
+ Package to ease upgrading from mozilla packages to the new iceape package.
+ .
+ This package can be purged at anytime once the iceape-browser package has
+ been installed.
+
+Package: mozilla-dom-inspector
+Architecture: all
+Section: web
+Depends: iceape-dom-inspector
+Description: Transition package for the DOM Inspector for the Iceape Internet Suite
+ Package to ease upgrading from mozilla packages to the new iceape package.
+ .
+ This package can be purged at anytime once the iceape-dom-inspector package
+ has been installed.
+
+Package: mozilla-js-debugger
+Architecture: all
+Section: devel
+Depends: mozilla-venkman (>= 0.9.87-4)
+Description: Transition package for venkman
+ Package to ease upgrading from mozilla packages to the separate venkman
+ package.
+ .
+ This package can be purged at anytime once the mozilla-venkman package has
+ been installed.
+
+Package: mozilla-calendar
+Architecture: all
+Section: misc
+Depends: iceape-calendar
+Description: Transition package for Iceape Calendar
+ Package to ease upgrading from mozilla packages to the new iceape package.
+ .
+ This package can be purged at anytime once the iceape-calendar package has
+ been installed.