Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

Add '-u' switch that would uncompress cores that were compressed by
kernel during dump time.

A real life scenario is that cores are compressed to reduce
size of dumpon partition, but we either don't care about space
in the /var/crash or we have a filesystem level compression of
/var/crash. And we want cores to be uncompressed in /var/crash
because we'd like to instantily read them with kgdb. In this
case we want kernel to write cores compressed, but savecore(1)
write them uncompressed.

Reviewed by: markj, gallatin
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D27245

Disable savecore(8)'s libcasper support when WITHOUT_DYNAMICROOT=yes.

This follows the example of other Capsicumized programs in /sbin.

Reported by: Manfred Antar <manfredantar@gmail.com>
MFC with: r342699
Sponsored by: The FreeBSD Foundation

Capsicumize savecore(8).

- Use cap_fileargs(3) to open dump devices after entering capability
mode, and use cap_syslog(3) to log messages.
- Use a relative directory fd to open output files.
- Use zdopen(3) to compress kernel dumps in capability mode.

Reviewed by: cem, oshogbo
MFC after: 2 months
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D18458

Restore /var/crash permissions to 0750, as declared in mtree file. After
r337337 it changed to 0755.

Reviewed by: loos
Approved by: loos
MFC after: 3 days
Sponsored by: Rubicon Communications, LLC (Netgate)
Differential Revision: https://reviews.freebsd.org/D18355

Move etc/minfree to sbin/savecore/.

This is prep for pkgbase to have config files tagged as such.

Approved by: will (mentor)
Differential Revision: https://reviews.freebsd.org/D16558

Explicitly add more files to the 'runtime' package.

Sponsored by: The FreeBSD Foundation

Make libxo depend on libutil because it uses humanize_number after r287111

Remove overlinking in lib/libxo/tests, sbin/savecore, and
usr.bin/{iscsictl,wc,xo}

PR: 203673
Sponsored by: EMC / Isilon Storage Division

Upgrade libxo to 0.4.5.

Local changes incorporated by 0.4.5: r284340
Local changes retained: r276260, r282117

Obtained from: https://github.com/Juniper/libxo

Convert savecore to libxo. The 'verbose' paths still use printf since they're
meant for interactivity on the command line and contain a lot of redundant
information.

Obtained from: Netflix, Inc.

Convert sbin/ to LIBADD
Reduce overlinking

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

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.

Switch the default WARNS level for sbin/ to 6.

Submitted by: Ulrich Spörlein

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

Initialize "he" in DoFile, so savecore(8) is WARNS=6 clean.
Bump WARNS accordingly.

style.Makefile(5):
Use WARNS?= instead of WARNS=.

Style.

- revert back to vmcore.#
- reimplement -z
- use syslog()
- improve consistancy of messages
- allow -f to recover cleared dumps
- return bufsize to 1024 * 1024
- return the ability to write sparse files
- update man page
- fix minfree to require 2k for info file instead of the kernel size
- include Berkeley copyright too due to amount of old code copied

Submitted by: Chad David <davidc@acns.ab.ca>

Duh, savecore is called savecore.

Savecore:

Commandline compatible with the previous savecore unless you specify
any options, none of them are implemented (yet).

Scans all devices marked "dump" or "swap" for dump header signatures
and saves dumps off under a name which is a MD5 hash of the header
information. This should give unique filenames. A *.info file contains
ascii version of the header information.

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

Reviewed by: mike

* Switch from doing compress(1)ed crashdumps with the -z flag to using
gzip(1). gdb doesn't understand these, but then again it didn't
understand compressed crashdumps either.
* Change a stray lseek() into a Lseek()
* Remove the extraneous prototype for log() which has apparently never
existed in FreeBSD's sources

Obtained from: NetBSD (partially)
MFC after: 2 weeks

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

Set the default manual section for sbin/ to 8.

a header file for zopen.3

Pointed out by: Philippe Charnier <charnier@lirmm.fr>

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.

BSD 4.4 Lite sbin Sources

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