one more place to use localhost for appveyor clarity in tests

examples/wsgiserver_ssl.py

@@ -13,8 +13,8 @@ def hello_world(env, start_response):
         start_response('404 Not Found', [('Content-Type', 'text/html')])
         return [b'<h1>Not Found</h1>']
 
-print('Serving on https://127.0.0.1:8443')
-server = pywsgi.WSGIServer(('0.0.0.0', 8443), hello_world, keyfile='server.key', certfile='server.crt')
+print('Serving on https://:8443')
+server = pywsgi.WSGIServer(('', 8443), hello_world, keyfile='server.key', certfile='server.crt')
 # to start the server asynchronously, call server.start()
 # we use blocking serve_forever() here because we have no other jobs
 server.serve_forever()

src/greentest/test___example_servers.py

@@ -13,7 +13,7 @@ import ssl
 
 class Test_wsgiserver(util.TestServer):
     server = 'wsgiserver.py'
-    URL = 'http://127.0.0.1:8088'
+    URL = 'http://localhost:8088'
     PORT = 8088
     not_found_message = b'<h1>Not Found</h1>'
     ssl_ctx = None
@@ -53,7 +53,7 @@ class Test_wsgiserver(util.TestServer):
             self._test_hello()
             # Now create a connection and only partway finish
             # the transaction
-            sock = socket.create_connection(('127.0.0.1', self.PORT))
+            sock = socket.create_connection(('localhost', self.PORT))
             ssl_sock = None
             if self._use_ssl:
                 ssl_sock = ssl.wrap_socket(sock)
@@ -86,7 +86,7 @@ class Test_wsgiserver(util.TestServer):
 
 class Test_wsgiserver_ssl(Test_wsgiserver):
     server = 'wsgiserver_ssl.py'
-    URL = 'https://127.0.0.1:8443'
+    URL = 'https://localhost:8443'
     PORT = 8443
     _use_ssl = True