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)

Remove advertising clause from University of California Regent's license,
per letter dated July 22, 1999.

Approved by: core, imp

Move _PATH_WALL from dump and shutdown's local pathnames.h to paths.h.

SECURITY.

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

Obtained from: OpenBSD
MFC after: 1 month

Move _PATH_DEFTAPE to <paths.h> to remove all the duplication of definitons,
and remove leading `r'(aw) from it.

Change rst0 into rsa0.

Backing out my change of /etc/rmt -> /usr/sbin/rmt.
Added comments in both files stateing why /etc/rmt is correct so someone
else wont do the same thing again.

Suggested by: Warner Losh & Ollivier

rmt is /usr/sbin/rmt, not /etc/rmt which is a link to /usr/sbin/rmt

Andreas Klemm's patch set for dump(8), with some minor (cosmetic)
changes and one addition by me.

. Use reasonable defaults for the tape drive (/dev/rst0) instead of
something we actually don't have.

. Add a summary line displaying the alapsed time and the total throughput.

. Replace "rmt" for the remote location of rmt(8) by "/etc/rmt", since this
is the historical protocol, and relying on the $PATH causes a big pain.
Make it adjustable via an environmental variable though.

Reviewed by: joerg (for Andreas' part)
Submitted by: andreas@knobel.gun.de (Andreas Klemm)

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.