feat(scripts) update-copyright
feat(scripts) update-copyright

This new script updates the COPYRIGHT file. In order to do that:

* It attempts to download the license files for some basic dependencies (like OpenResty and LuaRocks)
* It installs all the Lua rocks for the current kong rockspec
* It then attempts to download all the license files for said rocks.

Some license texts are hardcoded into the script because they were very difficult or impossible to download.

Kong/kong,Kong/kong,Kong/kong