rem_pid
static void rem_pid(); /* Removes a process from the table */
rem_pid((pid_t)0, i, DONT_CLEAN);
rem_pid((pid_t)0, i, CLEANIT);
rem_pid((pid_t)0, i, DONT_CLEAN);
rem_pid((pid_t)0, i, DONT_CLEAN);
rem_pid((pid_t)0, i, DONT_CLEAN);
rem_pid(utmpx->ut_pid, i, CLEANIT);
rem_pid(p->pd_pid, -1, DONT_CLEAN);