Fixed #13417 -- Clarified the use of the djangojs domain for translation....

Fixed #13417 -- Clarified the use of the djangojs domain for translation. Thanks to stephaner for the report and initial patch, and Ramiro Morales for his additional markup.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@13147 bcc190cf-cafb-0310-a4f2-bffc1f526a37