WordPress/wp-includes/ms-deprecated.php

<?php
/**
 * Deprecated functions from WordPress MU and the multisite feature. You shouldn't
 * use these functions and look for the alternatives instead. The functions will be
 * removed in a later version.
 *
 * @package WordPress
 * @subpackage Deprecated
 */

/*
 * Deprecated functions come here to die.
 */

/**
 * @since unknown
 * @deprecated 3.0
 * @deprecated Use wp_generate_password()
 * @see wp_generate_password()
 */
function generate_random_password( $len = 8 ) {
	_deprecated_function( __FUNCTION__, '3.0', 'wp_generate_password()' );
	return wp_generate_password($len);
}

/**
 * Determine if user is a site admin.
 *
 * Plugins should use is_multisite() instead of checking if this function exists
 * to determine if multisite is enabled.
 *
 * This function must reside in a file included only if is_multisite() due to
 * legacy function_exists() checks to determine if multisite is enabled.
 *
 * @since unknown
 * @deprecated 3.0
 * @deprecated Use is_super_admin()
 * @see is_super_admin()
 * @see is_multisite()
 *
 */
function is_site_admin( $user_login = '' ) {
	_deprecated_function( __FUNCTION__, '3.0', 'is_super_admin()' );

	if ( empty( $user_login ) ) {
		$user_id = get_current_user_id();
		if ( !$user_id )
			return false;
	} else {
		$user = new WP_User( null, $user_login) ;
		if ( empty( $user->id ) )
			return false;
		$user_id = $user->id;
	}

	return is_super_admin( $user_id );
}

?>