Builds using synchronous name resolver dislike marking the connection as async.

lib/url.c

@@ -3622,10 +3622,12 @@ static CURLcode CreateConnection(struct SessionHandle *data,
     infof(data, "Re-using existing connection! (#%ld) with host %s\n",
           conn->connectindex,
           conn->bits.httpproxy?conn->proxy.dispname:conn->host.dispname);
+#ifdef CURLRES_ASYNCH
     if(!conn->dns_entry) {
       infof(data, "... but it is not resolved yet!\n");
       *async = TRUE;
     }
+#endif
   }
   else {
     /*