getaddresses(): Like the change in rfc822.py, this one needs to access
the AddressList.addresslist attribute directly.

Also, add a test case for the email.Utils.getaddresses() interface.
diff --git a/Lib/email/Utils.py b/Lib/email/Utils.py
index a2b6c87..99a65f9 100644
--- a/Lib/email/Utils.py
+++ b/Lib/email/Utils.py
@@ -113,7 +113,7 @@
     """Return a list of (REALNAME, EMAIL) for each fieldvalue."""
     all = COMMASPACE.join(fieldvalues)
     a = _AddressList(all)
-    return a.getaddrlist()
+    return a.addresslist