mac_socket_check_send
error = mac_socket_check_send(job->fd_file->f_cred, so);
error = mac_socket_check_send(td->td_ucred, so);
error = mac_socket_check_send(active_cred, so);
error = mac_socket_check_send(fp->f_cred, so);
error = mac_socket_check_send(td->td_ucred, so);
error = mac_socket_check_send(td->td_ucred, so);
error = mac_socket_check_send(td->td_ucred, so);
int mac_socket_check_send(struct ucred *cred, struct socket *so);