Followup to issue #11140 and r88682: also patch _dummy_thread.
Patch by Aymeric Augustin.
diff --git a/Misc/ACKS b/Misc/ACKS
index f2b15d3..776b9ae 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -35,6 +35,7 @@
 Jason Asbahr
 David Ascher
 Chris AtLee
+Aymeric Augustin
 John Aycock
 Jan-Hein Bührman
 Donovan Baarda