Add missing $ as spotted by Kill Bill, ticket #4132

usr/local/www/services_captiveportal.php

@@ -1017,10 +1017,10 @@ function enable_change(enable_change) {
 					gettext('Upload an HTML/PHP file for the portal page here (leave blank to keep the current one). ' .
 							'Make sure to include a form (POST to %1$s) with a submit button (%2$s) and a hidden field with %3$s and %4$s. ' .
 							'Include the %5$s and %6$s and/or %7$s input fields if authentication is enabled, otherwise it will always fail.'),
-					'"$PORTAL_ACTION"',
+					'"$PORTAL_ACTION$"',
 					"name="accept"",
 					"name="redirurl"",
-					'value="$PORTAL_REDIRURL"',
+					'value="$PORTAL_REDIRURL$"',
 					""auth_user"",
 					""auth_pass"",
 					""auth_voucher"");