Adjust disabled registration wording, prevent manual form submission

public/actions/submit.php

@@ -17,6 +17,10 @@ function errorBack(string $errormsg) {
     die($errormsg);
 }
 
+if (!empty($SETTINGS["disable_registration"]) && $SETTINGS["disable_registration"] == true) {
+    die("Online registration is now closed.");
+}
+
 $database->action(function($database) {
     global $SETTINGS;
 

public/parts/signup.php

@@ -30,7 +30,7 @@ if (isset($_SESSION['familyid']) && $database->has('families', ['familyid' => $_
                     <div class="ml-auto mr-auto pl-4 align-self-center text-center">
                         <h1>Day Camp Registration</h1>
 
-                        <h3>Online registration for Day Camp is closed.</h3>
+                        <h3>Online registration is now closed.</h3>
                     </div>
                 </div>
             </div>