NOMMU re-exec trick shuld not depend on existence of "don't daemonize"
option for every affected applet (and dnsd, for example, don't have one).
Thus rework re-exec support to not require it. Code got smaller too.
diff --git a/sysklogd/klogd.c b/sysklogd/klogd.c
index cca6f56..fc0ed30 100644
--- a/sysklogd/klogd.c
+++ b/sysklogd/klogd.c
@@ -51,7 +51,8 @@
 
 	if (!(option_mask32 & OPT_FOREGROUND)) {
 #ifdef BB_NOMMU
-		vfork_daemon_rexec(0, 1, argc, argv, "-n");
+		if (!re_execed)
+			vfork_daemon_rexec(0, 1, argv);
 #else
 		bb_daemonize();
 #endif