SF bug #469910 by Alfonso Baciero: Bugfix for imaplib for macintosh

Pass binary mode to makefile().
diff --git a/Misc/ACKS b/Misc/ACKS
index 7ee0b87..6569766 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -20,6 +20,7 @@
 Jason Asbahr
 David Ascher
 Donovan Baarda
+Alfonso Baciero
 Stig Bakken
 Greg Ball
 Cesar Eduardo Barros