SF patch 518765 (Derek Harland): Bug in copy.py when used through
rexec.

When using a restricted environment, imports of copy will fail with an
AttributeError when trying to access types.CodeType.

Bugfix candidate (all the way back to 1.5.3, but at least 2.1.3 and
2.2.1).
diff --git a/Misc/ACKS b/Misc/ACKS
index 9a49b86..51780d8 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -176,6 +176,7 @@
 Stephen Hansen
 Barry Hantman
 Lynda Hardman
+Derek Harland
 Jason Harper
 Gerhard Häring
 Larry Hastings