Proxy support

[tuxmaster5000]

To use an proxy server for downloading images the environment variable http_proxy must be set.
But I can't see any option for it.

[tuxmaster5000]

I think, in the environment settings of the exec_defaults variable, an "+ $proxy" can fix it.
This hash array will then contains the needed proxy settings.

[southalc]

This is something I'm keeping in mind with the rewrite that's in progress. I plan to post a new branch with this and some other significant changes in the near future.

[tuxmaster5000]

@southalc Thanks

[rb83]

Is there perhaps a workaround for this in the meantime?

[tuxmaster5000]

@rb83 I don't have find one, only patching the code. Because you need to change the environment variables.

[rb83]

@southalc would you be interested in a PR, or does that conflict with your big rewrite?