MDL-16163 disable mnet scripts properly if mnet not enabled

mnet/publickey.php

@@ -10,6 +10,11 @@
 
 require_once(dirname(dirname(__FILE__)) . '/config.php');
 require_once $CFG->dirroot.'/mnet/lib.php';
+
+if ($CFG->mnet_dispatcher_mode === 'off') {
+    print_error('mnetdisabled', 'mnet');
+}
+
 header("Content-type: text/plain");
 $keypair = mnet_get_keypair();
 echo $keypair['certificate'];

mnet/testclient.php

@@ -13,6 +13,10 @@
 require_once(dirname(dirname(__FILE__)) . '/config.php');
 require_once $CFG->dirroot.'/mnet/xmlrpc/client.php';
 
+if ($CFG->mnet_dispatcher_mode === 'off') {
+    print_error('mnetdisabled', 'mnet');
+}
+
 // Site admins only, thanks.
 $context = get_context_instance(CONTEXT_SYSTEM);
 require_capability('moodle/site:config', $context);

mnet/xmlrpc/server.php

@@ -18,6 +18,10 @@ ini_set('display_errors',0);
 require_once $CFG->dirroot.'/mnet/lib.php';
 require_once $CFG->dirroot.'/mnet/remote_client.php';
 
+if ($CFG->mnet_dispatcher_mode === 'off') {
+    print_error('mnetdisabled', 'mnet');
+}
+
 // Content type for output is not html:
 header('Content-type: text/xml; charset=utf-8');