Fixed #5940: added sessions and webdesign cross-references to docs/add_ons.txt
Fixed #5940: added sessions and webdesign cross-references to docs/add_ons.txt

--HG--
extra : convert_revision : svn%3Abcc190cf-cafb-0310-a4f2-bffc1f526a37/django/trunk%406788

adieu/django-nonrel,adieu/django-nonrel,adieu/django-nonrel