[1.6.x] Prevented reverse() from generating URLs pointing to other hosts.

This is a security fix. Disclosure following shortly.

tests/urlpatterns_reverse/tests.py

@@ -147,6 +147,9 @@ test_data = (
     ('defaults', '/defaults_view2/3/', [], {'arg1': 3, 'arg2': 2}),
     ('defaults', NoReverseMatch, [], {'arg1': 3, 'arg2': 3}),
     ('defaults', NoReverseMatch, [], {'arg2': 1}),
+
+    # Security tests
+    ('security', '/%2Fexample.com/security/', ['/example.com'], {}),
 )
 
 class NoURLPatternsTests(TestCase):

tests/urlpatterns_reverse/urls.py

@@ -71,4 +71,7 @@ urlpatterns = patterns('',
     (r'defaults_view2/(?P<arg1>\d+)/', 'defaults_view', {'arg2': 2}, 'defaults'),
 
     url('^includes/', include(other_patterns)),
+
+    # Security tests
+    url('(.+)/security/$', empty_view, name='security'),
 )