respect the env http_proxy and https_proxy when buildozer download dependences

[aohan237]

you use python scripts to download the dependences of buildozer.

but it is hard to connect from China, and downloads will be closed randomly.

it is very nice if your python http request respects the env http_proxy and https_proxy

[AndreMiras]

Yes that makes sense indeed, also the all_proxy variable. Feel free to pull request it

[Julian-O]

#267 is potentially related.

[Julian-O]

All the direct downloads in Buildozer now use buildops.download(), which is built on urllib.request which respects the proxies set on the OS.

There may be indirect downloads caused by running installers, but I would expect them to respect proxies too.

So, I am expecting proxies to work now.

Please let us know if you are still having this issue.

[Julian-O]

This is being closed, but not forgotten. It has been consolidated into issue #1727.