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().

src/version.c

@@ -794,6 +794,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    433,
 /**/
     432,
 /**/