Add deprecation notices to the documentation to reflect recent additions to
PEP 4.
diff --git a/Doc/lib/librfc822.tex b/Doc/lib/librfc822.tex
index 9def859..1f78721 100644
--- a/Doc/lib/librfc822.tex
+++ b/Doc/lib/librfc822.tex
@@ -4,6 +4,11 @@
\declaremodule{standard}{rfc822}
\modulesynopsis{Parse \rfc{2822} style mail messages.}
+\deprecated{2.3}{The \refmodule{email} package should be used in
+ preference to the \module{rfc822} module. This
+ module is present only to maintain backward
+ compatibility.}
+
This module defines a class, \class{Message}, which represents an
``email message'' as defined by the Internet standard
\rfc{2822}.\footnote{This module originally conformed to \rfc{822},