Mac80211: opaque url handling in the backport package

@nbd I am confused now. Til the following commit we use the official backport from the backport project. But after that we use a package from the openwrt Mirror! I can't find anywhere who produces it and what exactly is contained in it and how. Can you please clarify your indentation? Is the backport project not alive anymore?

The commit message:

This should help stay in sync with upstream development

Is a little poor

Thanks for the feedback