parsedate_tz(): Fix SF bug #552345, optional FWS between the comma and

the day in an RFC 2822 date.

Lib/email/_parseaddr.py

@@ -47,9 +47,16 @@ def parsedate_tz(data):
     Accounts for military timezones.
     """
     data = data.split()
-    if data[0][-1] in (',', '.') or data[0].lower() in _daynames:
+    # The FWS after the comma after the day-of-week is optional, so search and
+    # adjust for this.
+    if data[0].endswith(',') or data[0].lower() in _daynames:
         # There's a dayname here. Skip it
         del data[0]
+    else:
+        i = data[0].rfind(',')
+        if i < 0:
+            return None
+        data[0] = data[0][i+1:]
     if len(data) == 3: # RFC 850 date, deprecated
         stuff = data[0].split('-')
         if len(stuff) == 3: