Mark deprecated modules as such.
diff --git a/Doc/library/multifile.rst b/Doc/library/multifile.rst
index c36ccb7..3e79229 100644
--- a/Doc/library/multifile.rst
+++ b/Doc/library/multifile.rst
@@ -4,6 +4,7 @@
 
 .. module:: multifile
    :synopsis: Support for reading files which contain distinct parts, such as some MIME data.
+   :deprecated:
 .. sectionauthor:: Eric S. Raymond <esr@snark.thyrsus.com>