Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Add two more features to cpuset(1):
- Add a new -C flag to create a new cpuset and move an existing pid into
that set.
- Allow 'all' to be specified for a cpu list (e.g. cpuset -s 1 -l all)
which maps to the list of all CPUs in the system.

MFC after: 2 weeks

Sync manpage's synopsis with program's usage().
Trim whitespace at EOL.

MFp4:
Bring in updated jail support from bz_jail branch.

This enhances the current jail implementation to permit multiple
addresses per jail. In addtion to IPv4, IPv6 is supported as well.
Due to updated checks it is even possible to have jails without
an IP address at all, which basically gives one a chroot with
restricted process view, no networking,..

SCTP support was updated and supports IPv6 in jails as well.

Cpuset support permits jails to be bound to specific processor
sets after creation.

Jails can have an unrestricted (no duplicate protection, etc.) name
in addition to the hostname. The jail name cannot be changed from
within a jail and is considered to be used for management purposes
or as audit-token in the future.

DDB 'show jails' command was added to aid debugging.

Proper compat support permits 32bit jail binaries to be used on 64bit
systems to manage jails. Also backward compatibility was preserved where
possible: for jail v1 syscalls, as well as with user space management
utilities.

Both jail as well as prison version were updated for the new features.
A gap was intentionally left as the intermediate versions had been
used by various patches floating around the last years.

Bump __FreeBSD_version for the afore mentioned and in kernel changes.

Special thanks to:
- Pawel Jakub Dawidek (pjd) for his multi-IPv4 patches
and Olivier Houchard (cognet) for initial single-IPv6 patches.
- Jeff Roberson (jeff) and Randall Stewart (rrs) for their
help, ideas and review on cpuset and SCTP support.
- Robert Watson (rwatson) for lots and lots of help, discussions,
suggestions and review of most of the patch at various stages.
- John Baldwin (jhb) for his help.
- Simon L. Nielsen (simon) as early adopter testing changes
on cluster machines as well as all the testers and people
who provided feedback the last months on freebsd-jail and
other channels.
- My employer, CK Software GmbH, for the support so I could work on this.

Reviewed by: (see above)
MFC after: 3 months (this is just so that I get the mail)
X-MFC Before: 7.2-RELEASE if possible

Support for CPU sets is going to appear in 7.1 before 8.0.

MFC after: 3 days

- When running a new command cause cpuset to operate on the per-thread mask
by default rather than the setmask. This is consistent with the linux
tool and more consistent with the notion that the default level is
the process level. The cpuset mask can still be modified by specifying
the -c option. You can not set the per-thread and cpuset mask in
a single command.
- Update the man page to reflect this change.

Contributed by: gallatin

Fix minor typo.

- Remove the -i argument when running a command to simplify things a
little bit and to prevent users from specifying a private mask that may
later restrict other group changes.
- Add a man page which brueffer generously contributed to.

Sponsored by: Nokia