[1.1.X] Fixed #11680: Added a note in the error-reporting documentation about...

[1.1.X] Fixed #11680: Added a note in the error-reporting documentation about basic e-mail configuration. Backport of [12686] from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.1.X@12687 bcc190cf-cafb-0310-a4f2-bffc1f526a37