Remove $FreeBSD$: alt one-line .c pattern

Remove /^\s*__RCSID\("\$FreeBSD\$"\);\n/

Add libxo(3) support to lastlogin(8).

Reviewed by: kp
Approved by: re (gjb)
MFC after: 1 week
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D16919

various: general adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

No functional change intended.

Allow custom files to be opened and allow sorting by timestamp.

While implementing a tool to import lastlog entries into utmpx, I
noticed lastlogin doesn't allow custom database files to be opened. Add
a -f switch to support this. Also, add -r and -t similar to ls(1),
ruptime(1), etc. where you can sort entries by timestamp and reverse
them. This allows you to spot active/idle users more easily.

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

Don't forget to catch realloc() errors.

Alphabetically sort the output of lastlogin(8).

According to the manpage, the entries have to be sorted by uid. This is
no longer possible, since our utmpx implementation is completely unaware
of user IDs. You can safely add entries for multiple users sharing the
same uid.

Make the output less random by sorting everything by name.

Chop off excessive long hostnames to keep the table structure intact.

This makes lastlogin(8) use exactly the same printf format as last(1).

Create the altix project branch. The altix project will add support
for the SGI Altix 350 to FreeBSD/ia64. The hardware used for porting
is a two-module system, consisting of a base compute module and a
CPU expansion module. SGI's NUMAFlex architecture can be an excellent
platform to test CPU affinity and NUMA-aware features in FreeBSD.

Remove unneeded setpassent() calls.

lastlogin no longer requires the use of the passwd database.

Port lastlogin(8) to utmpx.

While there, fix a bug I introduced previously. We must reopen the
database for each username passed on the command line. We must rewind
the database and search from the beginning.

ANSIfy almost all applications that use WARNS=6.

I was considering committing all these patches one by one, but as
discussed with brooks@, there is no need to do this. If we ever
need/want to merge these changes back, it is still possible to do this
per application.

Several refinements to libulog's API.

- Only set the fields in the ulog_utmpx structure that are valid for the
command in question. This means that strings like "shutdown" or "~"
are not visible to the user anymore.
- Rename UTXF_* to UTXI_*, indicating the indexation, instead of using
the `antique' filename. If we ever get rid of utmp, it makes little
sense calling it by its old name.

Port lastlogin(1) to libulog.

Just use ulog_getutxuser() to obtain lastlog records or ulog_getutxent()
to browse through all of them.

- Import the HEAD csup code which is the basis for the cvsmode work.

de-__P()

Fixed some world breakage caused by not updating clients when <timeconv.h>
was split off from <time.h>. This became fatal here when -Werror was
reenabled.

Don't depend on <pwd.h> to bogusly include <sys/types.h>.

I've been meaning to do this for a while. Add an underscore to the
time_to_xxx() and xxx_to_time() functions. e.g. _time_to_xxx()
instead of time_to_xxx(), to make it more obvious that these are
stopgap functions & placemarkers and not meant to create a defacto
standard. They will eventually be replaced when a real standard
comes out of committee.

Fix ctime(&int) due to change to lastlog->ll_time

Include stdlib.h for exit(3).

Submitted by: Mike Barcroft <mike@q9media.com>

Remove unused #includes, duplicate $FreeBSD$ and $NetBSD$ definitions.

Reviewed by: Ruslan Ermilov <ru@FreeBSD.org>

Added the lastlogin utility.

Obtained from: NetBSD