Fixed #4221 -- Removed dependence on hard-coded URL in tutorial 4.
Fixed #4221 -- Removed dependence on hard-coded URL in tutorial 4.

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extra : convert_revision : svn%3Abcc190cf-cafb-0310-a4f2-bffc1f526a37/django/trunk%405368

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