Inline documentation for hooks in wp-admin/network/upgrade.php.

Props miyauchi for the initial patch.
Fixes #25881.

Built from https://develop.svn.wordpress.org/trunk@26914


git-svn-id: http://core.svn.wordpress.org/trunk@26795 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/admin.php

@@ -66,13 +66,7 @@ if ( get_option('db_upgraded') ) {
 		if ( $c <= 50 || ( $c > 50 && mt_rand( 0, (int)( $c / 50 ) ) == 1 ) ) {
 			require_once( ABSPATH . WPINC . '/http.php' );
 			$response = wp_remote_get( admin_url( 'upgrade.php?step=1' ), array( 'timeout' => 120, 'httpversion' => '1.1' ) );
-			/**
-			 * Fires after the multisite DB upgrade is complete.
-			 *
-			 * @since 3.0.0
-			 *
-			 * @param array|WP_Error $response The upgrade response array or WP_Error on failure.
-			 */
+			/** This action is documented in wp-admin/network/upgrade.php */
 			do_action( 'after_mu_upgrade', $response );
 			unset($response);
 		}