Update Tornado

libs/tornado/netutil.py

@@ -20,7 +20,7 @@ from __future__ import absolute_import, division, print_function, with_statement
 
 import errno
 import os
-import platform
+import sys
 import socket
 import stat
 
@@ -105,7 +105,7 @@ def bind_sockets(port, address=None, family=socket.AF_UNSPEC,
     for res in set(socket.getaddrinfo(address, port, family, socket.SOCK_STREAM,
                                       0, flags)):
         af, socktype, proto, canonname, sockaddr = res
-        if (platform.system() == 'Darwin' and address == 'localhost' and
+        if (sys.platform == 'darwin' and address == 'localhost' and
                 af == socket.AF_INET6 and sockaddr[3] != 0):
             # Mac OS X includes a link-local address fe80::1%lo0 in the
             # getaddrinfo results for 'localhost'.  However, the firewall