schisamo/vagrant-omnibus — pull request #89 by fabriciocolombo (2014-07-05 15:42:20+00:00)
Title: make the plugin able to download behind proxy on windows guest

Currently the plugin is not able behind proxy on windows guest.
I rewrote the PowerShell script to try to download without proxy. If the attempt fails, a new attempt is made using the environment variables http_proxy and no_proxy. The new script also works if the proxy requires authentication.

This also fixes the issue #80

The proxy configuration can be done using then plugin [vagrant-proxyconf](https://github.com/tmatilai/vagrant-proxyconf).