Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

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

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

mount_nwfs(8): make WARNS=6 clean

uid_t and gid_t are unsigned. While initializing them to -1 and later
checking against -1 to see if they are still at their default usually
works, introduce two new flags and stop the inband signalling.

Approved by: ed (co-mentor)

Use sysctlbyname() instead of sysctl

Make this 64 bit clean. Use size_t for sysctl() length pointer args.

Now that the kernel is able to load modules itself,
remove all the code which was trying to do so.
This code was nasty in several ways, it was hiding
the kernel bug where the kernel was unable to properly
load a module, and it was quitting if it wasn't able
to load the module. The consequence is that an ABI
breakage of the vfsconf API would have broken *every*
mount utility.

- sys/n[tw]fs moved to sys/fs/n[tw]fs
- /usr/include/n[tw]fs moved to /usr/include/fs/n[tw]fs

Pass timezone information to an nwfs mount.

More style fixes, both to code and man page.

Submitted by: Philippe Charnier <charnier@xp11.frmug.org>

Unremoved used include of <sys/stat.h> (don't depend on pollution in
<sys/mount.h). Broken in: previous commit.

Removed unused include of <nwfs/nwfs.h>.

Some code cleanup based on the ideas from submitter.

Submitted by: Philippe Charnier <charnier@xp11.frmug.org>

Add mount_nwfs program. Now -current can mount NetWare volumes.