Fix ipv6 stuffs 7

pkg/http/client.go

@@ -215,10 +215,9 @@ func (r *HTTPClient) replaceHostIfNeeded(req *http.Request) {
 		return
 	}
 	// if hosts are found, ensure the host is an IPv6 host
-	host, port, err := net.SplitHostPort(req.URL.Host)
+	host, _, err := net.SplitHostPort(req.URL.Host)
 	if err != nil {
 		host = req.URL.Host // Use the host without port
-		port = "443"        // Default HTTPS port
 	}
 	found := false
 	for _, h := range r.ipv6Hosts {