[1.2.X] Better cross-referencing of the USE_THOUSAND_SEPARATOR setting in...

[1.2.X] Better cross-referencing of the USE_THOUSAND_SEPARATOR setting in documentation. Thanks to Klaas van Schelven for the patch.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@14579 bcc190cf-cafb-0310-a4f2-bffc1f526a37