Created event on_shutdown.

bin/auto

@@ -438,6 +438,9 @@ API::Std::cmd_add('SHUTDOWN', 2, 'cmd.shutdown', \%Core::Cmd::HELP_SHUTDOWN, \&C
 API::Std::cmd_add('RESTART', 2, 'cmd.restart', \%Core::Cmd::HELP_RESTART, \&Core::Cmd::cmd_restart);
 API::Std::cmd_add('REHASH', 2, 'cmd.rehash', \%Core::Cmd::HELP_REHASH, \&Core::Cmd::cmd_rehash);
 API::Std::cmd_add('HELP', 2, 0, \%Core::Cmd::HELP_HELP, \&Core::Cmd::cmd_help);
+# Core events.
+API::Std::event_add('on_shutdown');
+
 
 # Infinite while loop.
 while (1) {