Fork a child process and wait until the process terminates when the -P

option is specified. This behavior is documented on the manual page.

PR:		bin/187265
Submitted by:	Kimo R
MFC after:	2 weeks

usr.sbin/daemon/daemon.c

@@ -139,7 +139,7 @@ main(int argc, char *argv[])
 	 * get SIGCHLD eventually.
 	 */
 	pid = -1;
-	if (pidfile != NULL || restart) {
+	if (pidfile != NULL || ppidfile != NULL || restart) {
 		/*
 		 * Restore default action for SIGTERM in case the
 		 * parent process decided to ignore it.