在requests访问https的站点时，如:
url = 'https://bigdata.hddly.cn/wp-content/plugins/captcha-code-authentication/captcha_code_file.php'
rqg = requests.get(url, headers=headers, proxies=proxies)
会报错:
raise SSLError(e, request=request) requests.exceptions.SSLError: HTTPSConnectionPool(host='bigdat