rpc_auth
rpc_auth(handle, params_in, handle->cred, gss_target);
rpc_auth(kadm5_server_handle_t handle, kadm5_config_params *params_in,
call->rpc_auth.authtype = txdr_unsigned(AUTH_UNIX);
call->rpc_auth.authlen = txdr_unsigned(sizeof(struct auth_unix));
struct auth_info rpc_auth;