Rename thread to _thread and dummy_thread to _dummy_thread. Issue #2875.
diff --git a/Demo/threads/telnet.py b/Demo/threads/telnet.py
index 7366341..dfe4905 100644
--- a/Demo/threads/telnet.py
+++ b/Demo/threads/telnet.py
@@ -15,7 +15,7 @@
 
 import sys, os, time
 from socket import *
-import thread
+import _thread as thread
 
 BUFSIZE = 8*1024