Add Session cleaning

scripts/zmstats.pl.in

@@ -91,6 +91,9 @@ while( 1 ) {
     }
   } # end if ZM_LOG_DATABASE_LIMIT
 
+	# Delete any sessions that are more ethan a week old. Limiting to 100 because mysql sucks
+	zmDbDo('DELETE FROM Sessions WHERE access < ? LIMIT 100', time - (60*60*24*7));
+
   sleep($Config{ZM_STATS_UPDATE_INTERVAL});
 } # end while (1)