Crypt the swapfile.
diff --git a/runtime/doc/usr_11.txt b/runtime/doc/usr_11.txt
index c6c75b1..4c40408 100644
--- a/runtime/doc/usr_11.txt
+++ b/runtime/doc/usr_11.txt
@@ -283,6 +283,8 @@
If you really don't want to see this message, you can add the 'A' flag to the
'shortmess' option. But it's very unusual that you need this.
+For remarks about encryption and the swap file, see |:recover-crypt|.
+
==============================================================================
*11.4* Further reading