Add a warning about the experimental status of our win32 support

diff --git a/tornado/win32_support.py b/tornado/win32_support.py
index ee55d7e26224866219f1bcac2553c6c42af8c2d7..f3efa8e8929c876d53708b87f1cb69958fc6633d 100644 (file)
--- a/tornado/win32_support.py
+++ b/tornado/win32_support.py
@@ -1,3 +1,6 @@
+# NOTE: win32 support is currently experimental, and not recommended
+# for production use.
+
 import ctypes
 import ctypes.wintypes
 import os