touched key for WATCH refactored into a more general thing that can be used also for the cache system. Some more changes towards diskstore working.

src/redis.c

@@ -830,6 +830,9 @@ void initServer() {
     server.slaves = listCreate();
     server.monitors = listCreate();
     server.unblocked_clients = listCreate();
+    server.cache_flush_queue = listCreate();
+    server.cache_flush_delay = 0;
+
     createSharedObjects();
     server.el = aeCreateEventLoop();
     server.db = zmalloc(sizeof(redisDb)*server.dbnum);