mnet MDL-19260 add an addslashes_object when updating public keys

not merged to HEAD because of new db stuff

mnet/environment.php

@@ -169,7 +169,7 @@ function replace_keys() {
         }
         set_config('openssl', implode('@@@@@@@@', $this->keypair), 'mnet');
 
-        update_record('mnet_host', $this);
+        update_record('mnet_host', addslashes_object($this);
         error_log('New public key has been generated. It expires ' . date('Y/m/d h:i:s', $this->public_key_expires));
     }