Fixed #7542 -- Fixed bug in urlize where it was appending 'http://' to the...

Fixed #7542 -- Fixed bug in urlize where it was appending 'http://' to the link text. Thanks for the patch and tests, devin

git-svn-id: http://code.djangoproject.com/svn/django/trunk@7755 bcc190cf-cafb-0310-a4f2-bffc1f526a37