很奇怪，我在国内的时候开ss用git用得好好的，现在人在米国不需要ss了，git确连接不上。
今天断了ss, push之后出来这个错误提示：
fatal: unable to access 'http://.../spring-mvc.git/': Unable to receive initial SOCKS5 response.
然后按照 git 设置和取消代理 里的方法：
git config --global https.proxy http://127.0.0.1:1080
git config --global https.proxy https://127.0.0.1:1080
git config --global --unset http.proxy
git config --global --unset https.proxy
npm config delete proxy
# 只对github.com
git config --global http.https://github.com.proxy socks5://127.0.0.1:1080
git config --global --unset http.https://github.com.proxy
然后继续报错：
fatal: unable to access 'http://.../spring-mvc.git/': Failed to connect to 127.0.0.1 port 1080: Connection refused
然后按照git cannot clone or push? failed to connect, connection refused里的方法，继续：
This happens because a proxy is configured in git.
Since it's https proxy (and not http) git config http.proxy and git config --
global http.proxy can't help.
1 : take a look at your git configuration
git config --global -l
If you have nothing related to https proxy like https_proxy=... the
problem is not here.
If you have something related to https proxy then remove it from the file
~/.gitconfig and try again
2 : if it still doesn't work, unset environment variables
Check your environment variables :
env|grep -i proxy
You should have one or several lines with https_proxy=...
Unset one by one with : unset https_proxy (or HTTPS_PROXY
depending of the name of the variable)
3 : check environment variables again
env|grep -i proxy
If it shows nothing you should be good.
Note : This solution can applies to http and https proxy problems. just
the variables name changes from https to http
我在检查环境变量时后没发现https_proxy=这类的，但是发现了一个
ALL_PROXY=socks5://127.0.0.1:1080
明显是代理，然后我在git里输入了：
unset ALL_PROXY
再次检查环境变量，回应变成了空白，说明我已经取消代理了？
然后我再次push,貌似成功了，问题就此解决。
我关闭后再次启动iTerm后发现又一次出现了同样的问题，也就是我每次启动git会默认ALL_PROXY=socks5
