```
This is any string associated with a jail. It can be set upon jail
creation or added/modified later:
> jail -cm ... metaext="tag1=value1 tag2=value2" metaint="secrets"
Its value is not inherited from a parent jail.
A parent jail can read both metadata parameters, while a child jail can
read only its internal meta via security.jail.metaint sysctl.
The maximum size of metaext or metaint per jail is controlled with a
global security.jail.meta_maxbufsize sysctl. Decreasing it does not
alter the existing meta information.
MFC after: 6 months
Sponsored by: SkunkWerks GmbH
```