fix: 设置user_agent 支持阿里云 测速

src/framework/core.c

@@ -134,7 +134,7 @@ ProgStatus =
   .leader_selected_index = -1,
   .chgtype = ChgType_Auto,
   .chsrc_run_faas = false,
-  .user_agent = NULL,
+  .user_agent = "chsrc",
 };
 
 
@@ -644,12 +644,12 @@ measure_speed_for_url (void *url)
   /**
    * @note 我们用 —L，因为部分链接会跳转到其他地方，比如: RubyChina, npmmirror
    */
-  char *curl_cmd = xy_strcat (8, "curl -qsL ", ipv6,
+  char *curl_cmd = xy_strcat (10, "curl -qsL ", ipv6,
                                     " -o ", os_devnull,
                                     " -w \"%{http_code} %{speed_download}\" -m", time_sec,
                                     " -A ", ProgStatus.user_agent, " ", url);
 
-  // chsrc_info (xy_2strjoin ("测速命令 ", curl_cmd));
+  // chsrc_note2 (xy_2strcat ("测速命令 ", curl_cmd));
   char *curl_buf = xy_run (curl_cmd, 0);
   return curl_buf;
 }