resurrect openlog() + tzset() in the logger

They're not needed on OpenBSD nor in other systems... except under
sandbox.  These were added for capsicum() if I remember correctly,
but also with landlock it's better to initialize these things
earlier.

logger.c

@@ -61,6 +61,10 @@ static void
 logger_init(struct privsep *ps, struct privsep_proc *p, void *arg)
 {
 	p->p_shutdown = logger_shutdown;
+
+	openlog(getprogname(), LOG_NDELAY, LOG_DAEMON);
+	tzset();
+
 	sandbox_logger_process();
 }