When the wait*(2) syscalls wait for any process (P_ALL), they should

ignore processes created with the pdfork(2) syscall.

PR:		201054
Approved by:	pjd (mentor)
Discussed with:	emaste, rwatson

sys/kern/kern_exit.c

@@ -981,6 +981,10 @@ proc_to_reap(struct thread *td, struct proc *p, idtype_t idtype, id_t id,
 
 	switch (idtype) {
 	case P_ALL:
+		if (p->p_procdesc != NULL) {
+			PROC_UNLOCK(p);
+			return (0);
+		}
 		break;
 	case P_PID:
 		if (p->p_pid != (pid_t)id) {