Outputs the WPMU menu.

Fires before the Site Activation page is loaded.

Fires before the Site Activation page is loaded.

Fires before the Add Category form.

Fires before the link category form.

Fires after all built-in meta boxes have been added.

Fires when comment-specific meta boxes are added.

Fires when link-specific meta boxes are added.

Fires after all built-in meta boxes have been added, contextually for the given post type.

Filters the new default site meta variables.