(ipsec, "save password") change yes -> 1 for 28673. for...

(ipsec, "save password") change yes -> 1 for 28673. for https://github.com/opnsense/core/issues/1209

(cherry picked from commit 8459b38f)

src/etc/inc/ipsec.inc

@@ -690,7 +690,7 @@ EOD;
             }
 
             if (isset($a_client['save_passwd'])) {
-                $strongswan .= "\t\t28673 = yes\n";
+                $strongswan .= "\t\t28673 = 1\n";
             }
 
             if (!empty($a_client['pfs_group'])) {