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

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

Reflecting the removal of MSDOSFS_LARGE found in sys/conf/files:1.1173.
This should fix the run time bustage observed on recent -CURRENT whilst
mounting a MSDOS filesystem with non-default locale/code page:

link_elf: symbol msdosfs_fileno_free undefined
KLD msdosfs_iconv.ko: depends on msdosfs - not available

Remove the last vestige of opt_msdosfs.h.

Submitted by: grep(1)

Let kmod.mk touch opt_*.h files as needed.

Inspired by: imp's email

By popular request, add a workaround that allows large (>128GB or so)
FAT32 filesystems to be mounted, subject to some fairly serious limitations.

This works by extending the internal pseudo-inode-numbers generated from
the file's starting cluster number to 64-bits, then creating a table
mapping these into arbitrary 32-bit inode numbers, which can fit in
struct dirent's d_fileno and struct vattr's va_fileid fields. The mappings
do not persist across unmounts or reboots, so it's not possible to export
these filesystems through NFS. The mapping table may grow to be rather
large, and may grow large enough to exhaust kernel memory on filesystems
with millions of files.

Don't enable this option unless you understand the consequences.

- Support for multibyte charsets in LIBICONV.
- CD9660_ICONV, NTFS_ICONV and MSDOSFS_ICONV kernel options
(with corresponding modules).
- kiconv(3) for loadable charset conversion tables support.

Submitted by: Ryuichiro Imura <imura@ryu16.org>

Move adding -DPC98 to CFLAGS from each modules to sys/modules/Makefile.inc.

Drop <bsd.man.mk> support from <bsd.kmod.mk>.

Not objected to by: -current

- VFS_SET(msdos) -> VFS_SET(msdosfs)
- msdos.ko -> msdosfs.ko
- mount_msdos(8) -> mount_msdosfs(8)
- "msdos" -> "msdosfs" compatibility glue in mount(8)

Name this module msdos.ko so that mount_msdos(8) can autoload
it with vfsload("msdos").

(The proper fix would be to rename the `msdos' file system to
`msdosfs' in VFS_SET(), and mount_msdos(8) to mount_msdosfs(8).
But that would break too many existing fstab(5) setups, and
would require a lot of unnecessary documentation and code
msdos -> msdosfs changes.)

Noticed by: markm

- sys/msdosfs moved to sys/fs/msdosfs
- msdos.ko renamed to msdosfs.ko
- /usr/include/msdosfs moved to /usr/include/fs/msdosfs

Use a consistent style and one much closer to the rest of /usr/src

Use .include <bsd.kmod.mk> to get to ../../*/conf/kmod.mk instead of
encoding the relative path.

Pull in sys/conf/kmod.mk, rather than /usr/share/mk/bsd.kmod.mk.
This means that the kernel can be totally self contained now and is not
dependent on the last buildworld to update /usr/share/mk. This might
also make it easier to build 5.x kernels on 4.0 boxes etc, assuming
gensetdefs and config(8) are updated.

Define PC98 when MACHINE == pc98, because msdos_vfsops.c contains
`#ifdef PC98'.

Remove a whole bunch of "CFLAGS+= -DFSNAME" cruft. It hasn't been
needed for ages, but keeps getting cut/pasted into new Makefiles.
(Once apon a time it was used to activate mount arguments in
<sys/mount.h>, but that was killed with extreme prejudice long ago)

Bring these more into line with other modules that have .h files generated
on the fly.

$Id$ -> $FreeBSD$

Sample initial set of kld-ified modules. Not all have been completely
converted yet. These are more of a starting point. This is NOT connected
to the parent Makefile.

OK'ed by jkh (who is ever so patiently waiting)

Back out opt_diagnostic.h changes.

Make the LKMs handle DIAGNOSTIC as a new-style option.

Revert $FreeBSD$ back to $Id$

Make the long-awaited change from $Id$ to $FreeBSD$

This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.

Removed redundant delcaration of msdosfs_denode.c from the SRCS line.

Build LKMs for all ``easy'' filesystems. (lfs can be done, but it's more
work; ditto NFS and it's even more work.)