Clean up persistent host status from sendmail(8) (if so configured).

I had accumulated years' worth of junk files; now others won't
have to.

etc/periodic/daily/150.clean-hoststat

@@ -0,0 +1,11 @@
+#!/bin/sh
+#
+# $Id: 140.clean-rwho,v 1.3 1999/03/21 12:33:54 joerg Exp $
+#
+
+if [ -d /var/spool/.hoststat ] ; then
+	echo ""
+	echo "Removing stale files from /var/spool/.hoststat:"
+
+	cd /var/rwho && find * -mtime +3 -delete
+fi