Add support for exotic TLDs.

Indeed, before this patch, we were not supporting TLD which
contains digits and dashes (-) when "puny-encoded".

testUpdateHostsFile.py

@@ -840,9 +840,12 @@ class TestNormalizeRule(BaseStdout):
         # Note: "Bare"- Domains are accepted. IP are excluded.
         for rule in [
             "128.0.0.1",
+            "::1",
+            "0.0.0.0 128.0.0.2",
             "0.0.0 google",
             "0.1.2.3.4 foo/bar",
             "0.0.0.0 https",
+            "0.0.0.0 https..",
         ]:
             self.assertEqual(normalize_rule(rule, **kwargs), (None, None))
 
@@ -905,7 +908,7 @@ class TestNormalizeRule(BaseStdout):
             sys.stdout = StringIO()
 
     def test_no_comment_raw(self):
-        for rule in ("twitter.com", "google.com", "foo.bar.edu", "www.example-foo.bar.edu", "www.example-3045.foobar.com"):
+        for rule in ("twitter.com", "google.com", "foo.bar.edu", "www.example-foo.bar.edu", "www.example-3045.foobar.com", "www.example.xn--p1ai"):
             expected = (rule, "0.0.0.0 " + rule + "\n")
 
             actual = normalize_rule(