user_admin_url

	 * @since 3.0.0
	 *
	 * @param string $url  The complete network admin URL including scheme and path.
	 * @param string $path Path relative to the network admin URL. Blank string if
	 *                     no path is specified.
	 */
	return apply_filters( 'network_admin_url', $url, $path );
}

/**
 * Retrieves the URL to the admin area for the current user.
 *
 * @since 3.0.0
 *
 * @param string $path   Optional. Path relative to the admin URL. Default empty.
 * @param string $scheme Optional. The scheme to use. Default is 'admin', which obeys force_ssl_admin()
 *                       and is_ssl(). 'http' or 'https' can be passed to force those schemes.
 * @return string Admin URL link with optional path appended.