The output of `groups` after `sudo bash` lists the following groups:

```
wheel daemon kmem sys tty operator procview procmod everyone staff certusers localaccounts admin com.apple.sharepoint.group.2 _appstore _lpadmin _lpoperator _developer com.apple.access_screensharing com.apple.access_ssh com.apple.sharepoint.group.1 

```

What is the `wheel` user group for and why is it called `wheel`?