SF bug 622042: Don't expect response body from HEAD request.

Bug fix candidate.
diff --git a/Misc/ACKS b/Misc/ACKS
index 2fbe9af..a8dbb76 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -261,6 +261,7 @@
 Jim Hugunin
 Greg Humphreys
 Jeremy Hylton
+Mihai Ibanescu
 Juan David Ibáñez Palomar
 Tony Ingraldi
 John Interrante