Renamed file-uploads.txt from 'topics-file-uploads' to...

Renamed file-uploads.txt from 'topics-file-uploads' to 'topics-http-file-uploads' to be consistent with directory structure

git-svn-id: http://code.djangoproject.com/svn/django/trunk@9489 bcc190cf-cafb-0310-a4f2-bffc1f526a37