Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.Approved by: re (implicit)Sponsored by: The FreeBSD Foundation
mdoc: fix manlint warnings by unbreaking mdoc syntax
Make it clear in the example that jailparam_export's return valueshould be freed.MFC after: 3 days
Fixed markup (mostly) errors.
Add libjail, a (somewhat) simpler interface to the jail_set and jail_getsystem calls and the security.jail.param sysctls.Approved by: bz (mentor)