Fixed #11693 -- Added escaping for the dot in sitemap.xml in the URLpattern in...

Fixed #11693 -- Added escaping for the dot in sitemap.xml in the URLpattern in sitemaps.txt. Thanks, timo

git-svn-id: http://code.djangoproject.com/svn/django/trunk@12190 bcc190cf-cafb-0310-a4f2-bffc1f526a37