Merge pull request #3356 from yusaku/fix-module-firstkey

Fix the firstkey, lastkey, and keystep of moduleCommand

src/server.c

@@ -125,7 +125,7 @@ volatile unsigned long lru_clock; /* Server global current LRU time. */
  *    are not fast commands.
  */
 struct redisCommand redisCommandTable[] = {
-    {"module",moduleCommand,-2,"as",0,NULL,1,1,1,0,0},
+    {"module",moduleCommand,-2,"as",0,NULL,0,0,0,0,0},
     {"get",getCommand,2,"rF",0,NULL,1,1,1,0,0},
     {"set",setCommand,-3,"wm",0,NULL,1,1,1,0,0},
     {"setnx",setnxCommand,3,"wmF",0,NULL,1,1,1,0,0},