Fix from Michael Stone for SF bug #660476 and #513033 (bogus thread
state swaps in readline).
diff --git a/Misc/ACKS b/Misc/ACKS
index a9773d8..f3f5b8b 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -511,6 +511,7 @@
 Richard Stoakley
 Casper Stoel
 Peter Stoehr
+Michael Stone
 Ken Stox
 Daniel Stutzbach
 Paul Swartz