enh: allow any user to create a topic

source/dnode/mnode/impl/src/mndTopic.c

@@ -580,7 +580,7 @@ static int32_t mndProcessCreateTopicReq(SRpcMsg *pReq) {
     goto _OVER;
   }
 
-  if (mndCheckOperPrivilege(pMnode, pReq->info.conn.user, MND_OPER_CREATE_TOPIC) != 0) {
+  if (mndCheckTopicPrivilege(pMnode, pReq->info.conn.user, MND_OPER_CREATE_TOPIC, NULL) != 0) {
     goto _OVER;
   }
 
@@ -704,7 +704,7 @@ static int32_t mndProcessDropTopicReq(SRpcMsg *pReq) {
   }
 #endif
 
-  if (mndCheckDbPrivilegeByName(pMnode, pReq->info.conn.user, MND_OPER_READ_DB, pTopic->db) != 0) {
+  if (mndCheckTopicPrivilege(pMnode, pReq->info.conn.user, MND_OPER_DROP_TOPIC, pTopic) != 0) {
     return -1;
   }