PiBox

This will allow a single build to download the remote archives, but then save them to a local repository (web location) that can reduce the ISP cost of having to pull them from the internet.

This option should replace the Buildroot BR2_PRIMARY_SITE setting in the config file. Doing this allows us to use either an upstream option to Buildroot's downloads OR a local repository inside the local network. The local option could contain everything (reducing ISP costs) while the upstream option just has replacements to package versions missing or expired from Buildroot's downloads.