refactor: do some internal refactor.

source/client/src/clientImpl.c

@@ -436,7 +436,12 @@ int initEpSetFromCfg(const char* firstEp, const char* secondEp, SCorEpSet* pEpSe
       return -1;
     }
 
-    taosGetFqdnPortFromEp(firstEp, &mgmtEpSet->eps[0]);
+    int32_t code = taosGetFqdnPortFromEp(firstEp, &mgmtEpSet->eps[0]);
+    if (code != TSDB_CODE_SUCCESS) {
+      terrno = TSDB_CODE_TSC_INVALID_FQDN;
+      return terrno;
+    }
+
     mgmtEpSet->numOfEps++;
   }
 

source/common/src/tdatablock.c

@@ -31,7 +31,6 @@ int32_t taosGetFqdnPortFromEp(const char* ep, SEp* pEp) {
 
   if (pEp->port == 0) {
     pEp->port = tsServerPort;
-    return -1;
   }
 
   return 0;