Use pythontest.net instead of debian.org in test_urllib2net (GH-2755)

Lib/test/test_urllib2net.py

@@ -97,8 +97,8 @@ class OtherNetworkTests(unittest.TestCase):
 
     def test_ftp(self):
         urls = [
-            'ftp://ftp.debian.org/debian/README',
-            ('ftp://ftp.debian.org/debian/non-existent-file',
+            'ftp://www.pythontest.net/README',
+            ('ftp://www.pythontest.net/non-existent-file',
              None, urllib.error.URLError),
             ]
         self._test_urls(urls, self._extra_handlers())
@@ -287,7 +287,7 @@ class TimeoutTest(unittest.TestCase):
             self.addCleanup(u.close)
             self.assertEqual(u.fp.raw._sock.gettimeout(), 120)
 
-    FTP_HOST = 'ftp://ftp.debian.org/debian/'
+    FTP_HOST = 'ftp://www.pythontest.net/'
 
     def test_ftp_basic(self):
         self.assertIsNone(socket.getdefaulttimeout())