Mark deprecated modules as such.
diff --git a/Doc/library/sha.rst b/Doc/library/sha.rst
index 7af043e..3851d94 100644
--- a/Doc/library/sha.rst
+++ b/Doc/library/sha.rst
@@ -4,6 +4,7 @@
 
 .. module:: sha
    :synopsis: NIST's secure hash algorithm, SHA.
+   :deprecated:
 .. sectionauthor:: Fred L. Drake, Jr. <fdrake@acm.org>