home brew 突然 curl: (7) Failed to connect to 错误，谷歌了半天没找到答案。

电脑挂的 ss 全局代理，之前 home brew 完全使用正常， 3 月份的时候用 homebrew 安装了 charles ，然后导入了 charles 的 https 证书 到 mac 上。

今天使用 home brew 安装软件， brew cask install keka 结果提示 curl: (7) Failed to connect to github-cloud.s3.amazonaws.com port 443: Operation timed out 。

于是乎 brew doctor 检测问题，提示 Your system is ready to brew.
brew update ， brew upgrade. 均能正常更新使用

然后开始谷歌，搜了各种方法都没用，最后看到这位作者的解决方法， http://www.itkeyword.com/doc/9020916023480990x231/brew%20install%20opencv 想到可能是 charles 的证书导致的，最后删除了 charles 的证书，按照他的方法添加了环境变量，再次 brew doctor 却提示：
Please note that these warnings are just used to help the Homebrew maintainers
with debugging if you file an issue. If everything you use Homebrew for is
working fine: please don't worry and just ignore them. Thanks!

Warning: SSL_CERT_DIR support was removed from Apple's curl.
If fetching formulae fails you should:
unset SSL_CERT_DIR
and remove it from ~/.bash_profile if present.

Warning: Setting SSL_CERT_FILE can break downloading files; if that happens
you should unset it before running Homebrew.

Homebrew uses the system curl which uses system certificates by
default. Setting SSL_CERT_FILE makes it use an outdated OpenSSL, which
does not support modern OpenSSL certificate stores.

忽略后 brew cask install keka 提示：

==> Satisfying dependencies
complete
==> Downloading https://github.com/aonez/Keka/releases/download/v1.0.8/Keka-1.0.
Warning: ignoring SSL_CERT_DIR environment variable, not supported by libcurl


心累，求大神帮忙看看