append_hostkey_type
append_hostkey_type(b, "rsa-sha2-512");
append_hostkey_type(b, "rsa-sha2-256");
append_hostkey_type(b, sshkey_ssh_name(key));
append_hostkey_type(b,
append_hostkey_type(b,
append_hostkey_type(b, sshkey_ssh_name(key));