Initial import of binutils 2.22 on the new vendor branch

Future versions of binutils will also reside on this branch rather
than continuing to create new binutils branches for each new version.

When <sys/user.h> is included, it MUST be included first because it sets
a preprocessor variable that effects other header files.

Change kinfo_proc interface between kernel and userland.

Before, we were embedding a struct proc (among others) into struct
kinfo_proc. Every time we change implementation details in the kernel,
us

Change kinfo_proc interface between kernel and userland.

Before, we were embedding a struct proc (among others) into struct
kinfo_proc. Every time we change implementation details in the kernel,
userland has to be adapted (recompiled). In preparation for the coming
LWP changes this interface has been reworked. Now kinfo_proc is a
structure which does not depend on other structures on the kernel which
are subject to change. Instead, the routines fill_kinfo_proc and
fill_kinfo_lwp copy all values which are of interest between the kernel
structure and the stable kinfo_proc structure.

Furthermore, this change adds infrastructure to export LWP-specific data.
If userland requests LWP data, it sets the flag KERN_PROC_FLAG_LWP in the
sysctl oid. This leads to multiple kinfo_procs being exported. If not
set, the first LWP will used. This is like FreeBSD do it, and it seems
easy and simple. Note that userland was not yet adjusted to actually
request LWPs and aggregate this information if necessary. Besides, the
kernel does not yet have more than one LWP per process anyways.

This introduces a new file, kern/kern_kinfo.c, which is shared between
kernel and libkvm. This was done to avoid and remove code duplication.
Now kvm_getprocs constructs a complete struct proc, including pointers,
and then calls fill_kinfo_proc to do its job.

In-collaboration-with: Thomas E. Spanjaard <tgen@netphreax.net>

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Synchronize libkcore with recent file descriptor cleanups.

Add new structures for exporting the cputime statistics via 64 bit counters
and redo the timer frequence export.
Provide the interface glue for libkinfo and libkcore.
Additionally provide interfaces

Add new structures for exporting the cputime statistics via 64 bit counters
and redo the timer frequence export.
Provide the interface glue for libkinfo and libkcore.
Additionally provide interfaces to query ccpu, the number of cpus, tk_nin
and tk_nout.
Remove those fields from devstat.h's struct statinfo.
Remove kvm dependency of rpc.rstatd by using the newly added libkinfo
functions and the sysctl interface for vmmeter.
Use the new interface in systat, the iostat part is now kvm-free.
Use kinfo_get_sched_stathz in time.
Use the kinfo interface for everything beside getting the actual process list
in top. This also removes the Last PID, which could be added back easily.
Since the feature is not that useful and breaks e.g. the jail isolation,
I haven't added a sysctl to read nextpid.
Use the kinfo interface in vmstat.
Use the kinfo interface in iostat. iostat is now kvm-free and not
setgid kmem anymore. This also means that iostat can't be applied to
coredump anymore. If this functionality is important, the kcore kinfo wrapper
can be added easily.

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Add the basic of libkcore. Switch pstat to use kcore/kinfo backing,
defaulting to kcore for now.