Merge email package 4.0 from the sandbox, including documentation, test cases,
and NEWS updates.
diff --git a/Lib/email/_parseaddr.py b/Lib/email/_parseaddr.py
index 7d759ef..109ff5f 100644
--- a/Lib/email/_parseaddr.py
+++ b/Lib/email/_parseaddr.py
@@ -6,6 +6,13 @@
 Lifted directly from rfc822.py.  This should eventually be rewritten.
 """
 
+__all__ = [
+    'mktime_tz',
+    'parsedate',
+    'parsedate_tz',
+    'quote',
+    ]
+
 import time
 
 SPACE = ' '