Final confirmation before changing security settings

src/freedombone-sec

@@ -293,6 +293,19 @@ function interactive_setup {
           255) exit 0;;
       esac
   fi
+
+  dialog --title "Final Confirmation" \
+      --backtitle "Freedombone Security Configuration" \
+      --defaultno \
+      --yesno "\nPlease confirm that you wish your security settings to be changed?\n\nWARNING: any mistakes made in the security settings could compromise your system, so be extra careful when answering 'yes'." 7 60
+  sel=$?
+  case $sel in
+      1) echo 'Exiting without changing security settings'
+         exit 0;;
+      255) echo 'Exiting without changing security settings'
+           exit 0;;
+  esac
+
   clear
 }