Log Message:
lua-rocks: update to 3.8.0

## What's new in LuaRocks 3.8.0

* Support GitHub's protocol security changes transparently.
  * The raw git:// protocol will stop working on GitHub. LuaRocks already
    supports git+https:// as an alternative, but to avoid having to update
    every rockspec in the repository that uses git://github.com, which would
    require a large coordinated effort, LuaRocks now auto-converts github.com
    and www.github.com URLs that use git:// to git+https://
* `luarocks test` has a new flag `--prepare` that checks, downloads and
  installs the tool requirements and rockspec dependencies but does not
  run the test suite for the rockspec being tested.
* Code tweaks so that LuaRocks can run on a Lua interpreter built without
  the `debug` library.
* `luarocks upload` supports uploading pre-packaged `.src.rock` files.
* Configuration fixes for OpenBSD.
* Respect the existing value for the `variables.LUALIB` configuration
  variable if given explicitly by the user in the config file, rather
  than trying to override it with auto-detection.
* Windows fixes for setting file permissions:
  * Revert the use of `Everyone` back to `*S-1-1-0`
  * Quote the use of the `%USERNAME%` variable to support names with spaces