patch 8.1.0433: mapping can obtain text from inputsecret()

Problem:    Mapping can obtain text from inputsecret(). (Tommy Allen)
Solution:   Disallow CTRL-R = and CTRL-\ e when using inputsecret().
diff --git a/src/version.c b/src/version.c
index a009ef0..6c69b17 100644
--- a/src/version.c
+++ b/src/version.c
@@ -795,6 +795,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    433,
+/**/
     432,
 /**/
     431,