According to the [Nginx doc](https://nginx.org/en/docs/syntax.html): " Offsets can be also specified in gigabytes using the g or G suffixes". But the Nginx::Size currently doesn't support g or G: https://github.com/voxpupuli/puppet-nginx/blob/b42574b8c87da1171e3f0c9465b120fe4894f45f/types/size.pp#L4
