[1.0.X] Fixed #8688 -- Added a note about using a settings variable for the

static media viewer with the development server. Based on a suggestion from
trodrigues.

Backport of r9165 from trunk.


git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.0.X@9171 bcc190cf-cafb-0310-a4f2-bffc1f526a37