Make anchors more easily accessible from web browsers
Make behavior more intuitive when the key in a modules or build.install.lua section asks to rename a module.
I personally think it's a bad practice, but the syntax implies this is possible and the previous behavior is
surely worse than the new one. See http://stackoverflow.com/questions/18314068/does-luarocks-rockspec-use-only-file-names-for-module-sub-names