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

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

Switch the default WARNS level for sbin/ to 6.

Submitted by: Ulrich Spörlein

Make this WARNS=2 clean by
- using (intmax_t) and %j
- giving a non-empty format string to msg()

Include <stdint.h> directly instead of depending on <inttypes.h>
to do it.

Tested by: make universe

Removed all vestiges of KerberosIV.

Fixed the MLINKS assignment style.

De-Kerberise (KerberosIV). KerberosIV is no longer present, and
remote backups can still be done with Kerberos authentication using
SSH and Kerberos 5.

Add a caching option to dump. Use -C. Note that NetBSD has a caching option
called -r but it takes 512 byte blocks instead of megabytes, and I felt a
megabytes specification would be far more useful so I did not use the same
option character.

This will *greatly* improve dump performance at the cost of possibly
missing filesystem changes that occur between passes, and does a fairly
good job making up for the loss of buffered block devices. Caching is disabled
by default to retain historical behavior.

In tests, dump performance improved by about 40% when dumping / or /usr.

Beware that dump forks and the cache may wind up being larger then you
specify, but a more complex shared memory implementation would not produce
results that are all that much better so I kept it simple for now.

MFC after: 3 days

s/filesystem/file system/g as discussed on -developers

more file system > filesystem

Replaced exists() tests with two equivalent defined().

LIBDIR is defined in bsd.own.mk but sys.mk no longer
includes bsd.own.mk as of revision 1.60.

Default to WARNS=2.
Binary builds that cannot handle this must explicitly set WARNS=0.

Reviewed by: mike

SECURITY.

Notify operators using wall(1)'s -g option.
Drop ``setgid tty'' privilege.

Obtained from: OpenBSD
MFC after: 1 month

- Backout botched attempt to introduce MANSECT feature.
- MAN[1-9] -> MAN.

Set the default manual section for sbin/ to 8.

Use libcrypto instead of libdes.

Prepare for K5.

Fix for new KerberosFix for new Kerberos44

$Id$ -> $FreeBSD$

Remove useless `BINOWN=root' now that it is the default.

Fix LIBDIR (for aout/ELF).

Make this part of the 'krb' distribution.

Changes for the new KTH KerberosIV.

Implement Kerberized rcmd for rdump/rrestore. This is lacking the
options one would normally expect to set the realm, enable encryption,
and whatnot, but this actually is able to contact the remote server,
so at least it's a start. (As a bonus, the stripped static binary is
unquestionably exportable.)

Removed default setuid and added a comment to the manpage explaining this.

Convert to our man installation style. Also fixed long-standing bug
in `fastboot'/`fasthalt' in which the interpreter would hang around
after `reboot' or `halt' is run, causing an irritating ``Killed'' message.

This commit was generated by cvs2svn to compensate for changes in r1558,
which included commits to RCS files with non-trunk default branches.

BSD 4.4 Lite sbin Sources

Note: XNSrouted and routed NOT imported here, they shall be imported with
usr.sbin.