Per @klauspost we need to add info to the docs about MinIO's
recommendation to limit prefixes to no more than 10k objects.
This updates the glossary entry, object management doc, and admin
concepts to add that recommendation.
Closes#666
Updates `mc` reference docs for several releases of the MinIO Client.
- Adds missing flags to `mc admin trace`
- Updates `disk` -> `drive` throughout the docs, but not in all cases.
- Adds `--airgap flag` to `mc support profile` and `mc support perf`
commands.
- Updates the flags for `mc ilm add` command
- Adds `mc license unregister` command.
Closes#571Closes#614Closes#627Closes#633
