Remove $FreeBSD$: two-line nroff pattern

Remove /^\.\\"\n\.\\"\s*\$FreeBSD\$$\n/

Indicate that kgdb.1 is from ports/devel/gdb.

crashinfo: Add references to the gdb port/package

We intend to remove the obsolete GDB 6.1.1 from FreeBSD before FreeBSD 13.

Reviewed by jhb
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D27447

crashinfo(8): Fix a few mandoc warnings

- new sentence, new line

crashinfo: add "batch" mode and use it during boot

In batch mode, most messages go into the core.txt.N file instead of stdout.

Reviewed by: jhb
MFC after: 3 days
Sponsored by: Dell EMC
Differential Revision: https://reviews.freebsd.org/D10429

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.

Fixed markup.

Correct the information about when the respective functionality first
appeared in FreeBSD.

PR: 133785
Submitted by: Ulrich Spoerlein <uqs@spoerlein.net>
MFC after: 3 days

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

Add a script to perform simple analysis of a crash dump (either a full
dump or minidump). When the script is run, it generates a text file
containing the output of several commands run againt the core dump such
as kgdb (stack trace), ps, netstat, vmstat, iostat, dmesg, and fstat.

Obtained from: Yahoo!
MFC after: 2 weeks