Remove $FreeBSD$: one-line sh pattern

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

sh(1): fix home/del key on mobaxterm env

For $reason mobaxterm default on sending unusual sequence from home/del
key, which makes libedit unabel to catch them and bind them correctly.

mobaxterm seems popular on the windows environment, so add proper
keybinding to default shrc configuration so it works out of box.

Reported by: lme

skel: update .shrc as well

Somehow we end up having 2 definition of the same .shrc in the source
tree, both of them should have been updated.

A batter fix would be to only keep one copy of the same file. but that
would be for another commit

Reported by: lme

Make sh(1) support \u in PS1. This removes one fork/exec on interactive
shell startup.

Reviewed by: 0mp (man page), jilles
MFC after: 2 weeks
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D18790

Give sh(1) a proper default prompt instead of just "$".

Reviewed by: jilles
MFC after: 2 weeks
Relnotes: totally
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D18697

Add current working directory to the default (although commented out) sh(1)
prompt, so it looks just like the tcsh(1) one when you uncomment it.

Reviewed by: jilles
MFC after: 2 weeks
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D18673

Simplify the way we set the default sh(1) PS1. No functional changes.

Reviewed by: jilles
MFC after: 2 weeks
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D18662

skel: Quote PAGER in dot.shrc

PR: 181853
Submitted by: pl@catslair.org
MFC After: 1 week

skel: Remove reference to deleted part in previous commit to this file.

Reported by: Rodney W. Grimes
MFC after: 1 week

skel: Do not set -o emacs in .shrc.

sh has defaulted to 'set -o emacs' since FreeBSD 9.0. Therefore, do not set
this again in .shrc, since that only serves to prevent invocations like
'sh -o vi' and 'sh +o emacs' to have the intended effect.

PR: 215958
Submitted by: Andras Farkas
MFC after: 1 week

skel/.shrc: Improve commented CDPATH example for POSIX requirements.

POSIX says an empty entry in CDPATH shall not result in the new directory
being printed, while any non-empty entry shall result in the new directory
being printed, including ".". Therefore, the value of CDPATH should almost
always start with a colon, not dot and colon.

Our sh does not print the name for empty entries as well as "." entries.

MFC after: 1 week

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.

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

Turn on emacs line editing mode by default, as this is what most shells do
these days, and the average user expects ^A and arrow keys to work, however
if they know nothing of editing modes, they will think sh(1) just sucks. It
is likely that because of defaults on most systems and with most shells that
anyone who actually wants vi(1) editing mode will have 'set -o vi'. This
won't affect existing accounts, this way, of course. Only accounts with
.shrc from new etc/skel will be affected. This is much better than making
the change in sh(1).

$Id$ -> $FreeBSD$

Move aliases and shell flags from .profile to .shrc so these settings
are effective in interactive non-login shells, e.g. xterm or su(1).

Submitted by: Wolfgang Helbig <helbig@ba-stuttgart.de>
Finally close PR #3740