Fix bug #6476 - more then 3000 smbd-zombies in memory

We weren't reaping children in the [x]inetd case.
Jeremy.

source3/smbd/server.c

@@ -1055,6 +1055,11 @@ extern void build_options(bool screen);
 	BlockSignals(False, SIGUSR1);
 	BlockSignals(False, SIGTERM);
 
+	/* Ensure we leave no zombies until we
+	 * correctly set up child handling below. */
+
+	CatchChild();
+
 	/* we want total control over the permissions on created files,
 	   so set our umask to 0 */
 	umask(0);
@@ -1221,6 +1226,13 @@ extern void build_options(bool screen);
 		/* close our standard file descriptors */
 		close_low_fds(False); /* Don't close stderr */
 
+#ifdef HAVE_ATEXIT
+		atexit(killkids);
+#endif
+
+	        /* Stop zombies */
+		smbd_setup_sig_chld_handler();
+
 		smbd_process();
 
 		exit_server_cleanly(NULL);