Allow additional redirect hosts

You can allow additional hosts when validating redirects by using the allowed_redirect_hosts filter.

function my_allowed_redirect_hosts( $hosts ) {
	$my_hosts = array(
		'blog.example.com',
		'codex.example.com',
	);
	return array_merge( $hosts, $my_hosts );
};
add_filter( 'allowed_redirect_hosts', 'my_allowed_redirect_hosts' );