flua: move modules source into the main source directory

Follow the path of what is done with bsnmp, build the modules along
with the main binary, this allows to build the modules at a moment
where

flua: move modules source into the main source directory

Follow the path of what is done with bsnmp, build the modules along
with the main binary, this allows to build the modules at a moment
where all needed libraries are already built and available in the
linker path instead of having to declare all the libraries which a
flua module will be linked to in _prebuild_libs.

Discused with: markj
Reviewed by: markj, jrtc27, kevans, imp
Accepted by: kevans, imp
Differential Revision: https://reviews.freebsd.org/D46610

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Remove $FreeBSD$: two-line nroff pattern

Remove /^\.\\"\n\.\\"\s*\$FreeBSD\$$\n/

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix

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jail(3lua): add jail.attach()/jail.remove() methods

These aren't a part of or use libjail(3), but rather are direct
syscalls. Still, they seem like good additions, allowing us to attach
to already-

jail(3lua): add jail.attach()/jail.remove() methods

These aren't a part of or use libjail(3), but rather are direct
syscalls. Still, they seem like good additions, allowing us to attach
to already-running jails.

Reviewed by: freqlabs
Differential Revision: https://reviews.freebsd.org/D26927

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jail(3lua): add a jail.list() method

This is implemented as an iterator, reusing parts of the earlier logic
to populate jailparams from a passed in table.

The user may request any number of paramet

jail(3lua): add a jail.list() method

This is implemented as an iterator, reusing parts of the earlier logic
to populate jailparams from a passed in table.

The user may request any number of parameters to pull in while we're
searching, but we'll force jid and name to appear at a minimum.

Reviewed by: freqlabs
Differential Revision: https://reviews.freebsd.org/D26756

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flua: Add a libjail module

libjail is pretty small, so it makes for a good proof of concept demonstrating
how a system library can be wrapped to create a loadable Lua module for flua.

* Introduce 3

flua: Add a libjail module

libjail is pretty small, so it makes for a good proof of concept demonstrating
how a system library can be wrapped to create a loadable Lua module for flua.

* Introduce 3lua section for man pages
* Add libjail module

Reviewed by: kevans, manpages
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D26080

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