It's now using mimetools instead of rfc822

Doc/lib/liburllib.tex

@@ -31,10 +31,10 @@ used at those few places where a true built-in file object is
 required.)
 
 The \code{info()} method returns an instance of the class
-\code{rfc822.Message} containing the headers received from the server,
+\code{mimetools.Message} containing the headers received from the server,
 if the protocol uses such headers (currently the only supported
 protocol that uses this is HTTP).  See the description of the
-\code{rfc822} module.
+\code{mimetools} module.
 \end{funcdesc}
 
 \begin{funcdesc}{urlretrieve}{url}

Doc/liburllib.tex

@@ -31,10 +31,10 @@ used at those few places where a true built-in file object is
 required.)
 
 The \code{info()} method returns an instance of the class
-\code{rfc822.Message} containing the headers received from the server,
+\code{mimetools.Message} containing the headers received from the server,
 if the protocol uses such headers (currently the only supported
 protocol that uses this is HTTP).  See the description of the
-\code{rfc822} module.
+\code{mimetools} module.
 \end{funcdesc}
 
 \begin{funcdesc}{urlretrieve}{url}