BaseTest.check_prepare(): the default hostname on Windows isn't an

empty string, so check_prepare() can't expect factory.prepare() to
change the host on Windows.  This repairs Windows failures in

test_fcgi_factory
test_ftp_factory
test_http_factory
test_icp_factory
test_webdav_source_factory
test_monitor_factory_with_emergency_user
test_monitor_factory_without_emergency_user

Unfortunately, it also exposes 2 new Windows failures in

test_http_factory
test_webdav_source_factory

lib/python/ZServer/tests/test_config.py

@@ -57,6 +57,10 @@ class BaseTest(unittest.TestCase):
         return conf.servers[0]
 
     def check_prepare(self, factory):
+        # On Linux the default hostname is an empty string, but on Windows
+        # it's "localhost".  So factory.prepare() will replace factory.host
+        # with "127.0.0.1" only on non-Windows boxes.
+        expected_factory_host = factory.host or "127.0.0.1"
         port = factory.port
         o = object()
         factory.prepare("127.0.0.1", o, "module",
@@ -68,7 +72,7 @@ class BaseTest(unittest.TestCase):
             self.assert_(factory.host is None)
             self.assert_(factory.port is None)
         else:
-            self.assertEqual(factory.host, "127.0.0.1")
+            self.assertEqual(factory.host, expected_factory_host)
             self.assertEqual(factory.port, 9300 + port)