py3: base64.{decode,encode}string() renamed to {decode,encode}bytes().

{encode,decode}string() aliases available but clearer this way...

product/Localizer/MessageCatalog.py

@@ -28,7 +28,7 @@ from future import standard_library
 standard_library.install_aliases()
 from builtins import str
 from past.builtins import basestring
-from base64 import encodestring, decodestring
+from base64 import encodebytes, decodebytes
 from hashlib import md5
 from re import compile
 from time import gmtime, strftime, time
@@ -97,7 +97,7 @@ def message_encode(message):
         encoding = HTTPRequest.default_encoding
         message = message.encode(encoding)
 
-    return encodestring(message)
+    return encodebytes(message)
 
 
 def message_decode(message):
@@ -106,7 +106,7 @@ def message_decode(message):
     To be used in the user interface, to avoid problems with the
     encodings, HTML entities, etc..
     """
-    message = decodestring(message)
+    message = decodebytes(message)
     encoding = HTTPRequest.default_encoding
     return str(message, encoding)