Fixed #17460 -- Extended the HIDDEN_SETTINGS constant in  with a few more sensible names of settings to hide in the debug view. Many thanks to chomik, lpiatek and tomaszrybak.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@17481 bcc190cf-cafb-0310-a4f2-bffc1f526a37