- Add sysctl to allow unprivileged users to call mlock(2)-family system   calls and turn it on. - Do not allow to call them inside jail. [1]
- Add sysctl to allow unprivileged users to call mlock(2)-family system
  calls and turn it on.
- Do not allow to call them inside jail. [1]

Pointed out by:	trasz [1]
Reviewed by:	avg
Approved by:	kib (mentor)
MFC after:	1 week

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