Use the 64 bit sized struct kinfo_proc for AMD64.
Fix transcription error.  Use == NULL, not != NULL.  Fortunately this
was harmless.
We use i386 boot code on AMD64.
Add support for IC Book Ironclad Pro/Lite 8-port cards.

Sponsired by:	IC Book Labs
MFC After:	2 weeks
Add AMD64 hooks
Repocopy from x86_64/... to amd64/...
Rename visible x86_64 references to amd64.
Kill MID_MACHINE, its a.out specific, the only platform that supports it
is i386.  All of the other platforms should remove it too.
Kill MID_MACHINE, its a.out specific, the only platform that supports
it is i386. All of the other platforms should remove it too.
	-- peter@
KPT_MIN_ADDRESS and KPT_MAX_ADDRESS are not used anywhere.  And if they
were, they are not safe to use outside of the kernel since these values
can change at kernel compile time - ie: we do not want them compiled into
userland binaries.
Commit MD parts of a loosely functional AMD64 port.  This is based on
a heavily stripped down FreeBSD/i386 (brutally stripped down actually) to
attempt to get a stable base to start from.  There is a lot missing still.
Worth noting:
- The kernel runs at 1GB in order to cheat with the pmap code.  pmap uses
  a variation of the PAE code in order to avoid having to worry about 4
  levels of page tables yet.
- It boots in 64 bit "long mode" with a tiny trampoline embedded in the
  i386 loader.  This simplifies locore.s greatly.
- There are still quite a few fragments of i386-specific code that have
  not been translated yet, and some that I cheated and wrote dumb C
  versions of (bcopy etc).
- It has both int 0x80 for syscalls (but using registers for argument
  passing, as is native on the amd64 ABI), and the 'syscall' instruction
  for syscalls.  int 0x80 preserves all registers, 'syscall' does not.
- I have tried to minimize looking at the NetBSD code, except in a couple
  of places (eg: to find which register they use to replace the trashed
  %rcx register in the syscall instruction).  As a result, there is not a
  lot of similarity.  I did look at NetBSD a few times while debugging to
  get some ideas about what I might have done wrong in my first attempt.
Rewrite minor number decoding.  Now we have only three types of
object: subdisks, plexes and volumes.  The encoding for plexes and
subdisks no longer reflects the object to which they belong.  The
super devices are high-order volume numbers.  This gives vastly more
potential volumes (4 million instead of 256).

Remove an unnecessary goto.

vinumopen: Return EINVAL, not ENXIO, on an attempt to open a
referenced plex.
Remove "to do" comments.

get_emppty_drive: Fix a day one bug with strcpy parameters.

Change name of find_drive_by_dev to the more descriptive
find_drive_by_name.

Rewrite minor number decoding.  Now we have only three types of
object: subdisks, plexes and volumes.  The encoding for plexes and
subdisks no longer reflects the object to which they belong.  The
super devices are high-order volume numbers.  This gives vastly more
potential volumes (4 million instead of 256).
Use microtime, not getmicrotime, for timing debug entries.

init_drive: Rephrase error message text.
	    Remove dead code (inside #if 0).

Change name of find_drive_by_dev to the more descriptive
find_drive_by_name.

Tidy up comments.
Rewrite minor number decoding.  Now we have only three types of
object: subdisks, plexes and volumes.  The encoding for plexes and
subdisks no longer reflects the object to which they belong.  The
super devices are high-order volume numbers.  This gives vastly more
potential volumes (4 million instead of 256).

As a result of the minor number changes, split out the superdevice
handling into a separate function, vinum_super_ioctl.  This was most
of the code of vinumioctl.

attachobject: Improve error checking.
Don't make definition of kw_debug dependent on VINUMDEBUG.  It's only
an enum value, and dropping it can lead to some spectacular surprises
in userland.
#ifdef VINUMDEBUG, not #if VINUMDEBUG.
Use strrchr, not rindex.  This is for compatibility with other
systems, and requires a #define.
Don't make definition of kw_debug dependent on VINUMDEBUG.  In
userland, define the keyword even if the kernel module doesn't have
debug code.
Terminate a comment.
Rewrite minor number decoding.  Now we have only three types of
object: subdisks, plexes and volumes.  The encoding for plexes and
subdisks no longer reflects the object to which they belong.  The
super devices are high-order volume numbers.  This gives vastly more
potential volumes (4 million instead of 256).

Tidy up comments.

Check for null rqgs.  This continue to be reported, though I can't
work out why.

Correct formats for some error messages.  Don't cast the value to
match the format.

Use microtime, not getmicrotime, for timing debug entries.
Rewrite minor number decoding.  Now we have only three types of
object: subdisks, plexes and volumes.  The encoding for plexes and
subdisks no longer reflects the object to which they belong.  The
super devices are high-order volume numbers.  This gives vastly more
potential volumes (4 million instead of 256).

Correct formats for some error messages.  Don't cast the value to
match the format.