Fixed #7735 -- Added support for IPv6 adresses to runserver and testserver...

Fixed #7735 -- Added support for IPv6 adresses to runserver and testserver management command. Thanks to Jason Alonso and Łukasz Rekucki for the report and initial patches.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@14711 bcc190cf-cafb-0310-a4f2-bffc1f526a37