Fix some endcase bugs in unicode rfind()/rindex() and endswith().
These were reported and fixed by Inyeol Lee in SF bug 595350.  The
endswith() bug was already fixed in 2.3, but this adds some more test
cases.
diff --git a/Misc/ACKS b/Misc/ACKS
index 13a797b..b77244e 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -292,6 +292,7 @@
 Piers Lauder
 Chris Lawrence
 Christopher Lee
+Inyeol Lee
 Luc Lefebvre
 Kip Lehman
 Marc-Andre Lemburg