Propagate uppercase proxy env variables to git

[2opremio]

Only supporting the lowercase ones is confusing for the end users.

[hiddeco]

There is a reason behind this, the official format of the http_proxy environmental variable is lowercase.

Using the uppercase format has no effect as git follows curl, and curl mentions:

The environment variables can be specified in lower case or upper case. The lower case version has precedence. http_proxy is an exception as it is only available in lower case.

[2opremio]

I did look at the code and didn't see it it handled in lowercase, but I thought I wasn't checking it properly

[hiddeco]

🏅