usr.sbin: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/
Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/
Remove /\n+#if.*\n#endif.*\n+/
Remove /^#if.*\n#endif.*\n/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/

Sponsored by: Netflix

Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

Mark usage function as __dead2 in programs where it does not return

In most cases, usage does not return, so mark them as __dead2. For the
cases where they do return, they have not been marked __dead2.

Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/735

align nfsdumpstate column output

There are scenarios where an NFS client will mount an NFSv4 export
without specifying a callback address.

When running nfsdumpstate under this circumstance, the column output is
shifted incorrectly which places the "ClientID" value underneath the
"Clientaddr" column.

This diff is a small cosmetic change that prints a blank in the
"Clientaddr" column and ensures the data for the columns are aligned
appropriately.

Submitted by: Caleb St. John
Reviewed by: sef (previous version)
MFC after: 3 days
Sponsored by: iXsystems, Inc.
Differential Revision: https://reviews.freebsd.org/D18958

Add #ifdef INET6 around declaration of nbuf.

It was reported that without #ifdef INET6 around the declaration of "nbuf",
a build would report an unused variable. For some reason, I didn't see that
warning when I did a build, but it seems reasonable to add these #ifdef INET6's.

Submitted by: dmitryluhtionov@gmail.com
MFC after: 1 week

Add support to nfsdumpstate for printing of INET6 addresses for locks.

r346190 added support for printing of INET6 addresses for the "-o" option
(all opens) but missed adding support for INET6 addresses for the "-l" option.
This patch adds that support.

PR: 223036
MFC after: 1 week

Fix nfsdumpstate(8) so that it can print out INET6 callback addresses.

The patch adds support for printing of INET6 callback addresses.
It also adds the #ifdef INET, INET6 as requested by bz@.

PR: 223036
Reviewed by: bz, rgrimes
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D19839

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

Fix handling of the "-l" argument for nfsdumpstate(8).

Submitted by: zack.kirsch at isilon.com
MFC after: 2 weeks

Create the altix project branch. The altix project will add support
for the SGI Altix 350 to FreeBSD/ia64. The hardware used for porting
is a two-module system, consisting of a base compute module and a
CPU expansion module. SGI's NUMAFlex architecture can be an excellent
platform to test CPU affinity and NUMA-aware features in FreeBSD.

Code cleanup for nfs4 utilities:

- Mark internal routines as static;
- Eliminate unused parameters where possible, mark __unused for others;
- Remove unused variables;
- Use %jd for int64_t values in printf();
- Add appropriate %d for printf to match its parameter;
- Rename a variable to resolve conflict with revoke(2);

Reviewed by: rmacklem
Tested with: make universe (bugs are mine)

Add two new utilities and two new daemons to /usr/src/usr.sbin that
are specifically used by the experimental nfsv4 subsystem.
nfscbd - The NFSv4 client callback daemon.
nfsuserd - The NFSv4 daemon that maps between user and group name
and their corresponding uid/gid numbers.
nfsdumpstate - A utility that dumps out the NFSv4 Open/Lock state.
nfsrevoke - Administratively revokes an NFSv4 client, releasing all
NFSv4 Open/Lock state it holds on the server.

Approved by: kib (mentor)