ed(1): Grammar fixes

- Adding a missing verb "is" on line 723
- Changing is to are on line 835

Event: Advanced UNIX Programming Course (Fall’23) at NTHU.
Pull Request: https://github.com/freebsd/freebsd-src/pull/986

Remove $FreeBSD$: one-line nroff pattern

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

ed(1): Add two references in the SEE ALSO section

Obtained from: OpenBSD
MFC after: 1 week

Drop ed(1) "crypto"

You should not be using DES. You should not have been using DES for the
past 30 years.

The ed DES-CBC scheme lacked several desirable properties of a sealed
document system, even ignoring DES itself. In particular, it did not
provide the "integrity" cryptographic property (detection of tampering), and
it treated ASCII passwords as 64-bit keys (instead of using a KDF like
scrypt or PBKDF2).

Some general approaches ed(1) users might consider to replace the removed
DES mode:

1. Full disk encryption with something like AES-XTS. This is easy to
conceptualize, design, and implement, and it provides confidentiality for
data at rest. Like CBC, it lacks tampering protection. Examples include
GELI, LUKS, FileVault2.

2. Encrypted overlay ("stackable") filesystems (EncFS, PEFS?, CryptoFS,
others).

3. Native encryption at the filesystem layer. Ext4/F2FS, ZFS, APFS, and
NTFS all have some flavor of this.

4. Storing your files unencrypted. It's not like DES was doing you much
good.

If you have DES-CBC scrambled files produced by ed(1) prior to this change,
you may decrypt them with:

openssl des-cbc -d -iv 0 -K <key in hex> -in <inputfile> -out <plaintext>

Reviewed by: allanjude, bapt, emaste
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D17829

Remove bdes(1)

The use of DES for anything is discouraged, especially with a static IV of 0

If you still need bdes(1) to decrypt Kirk's video lectures, see
security/bdes in ports.

This commit brought to you by the FOSDEM DevSummit and the
"remove unneeded dependancies on openssl in base" working group

Reviewed by: bapt, brnrd
Relnotes: yes
Sponsored by: FOSDEM DevSummit
Differential Revision: https://reviews.freebsd.org/D9424

Use .At macro instead of specifying AT&T UNIX literaly.

PR: 212034
Approved by: bcr (mentor)
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D8114

mdoc: escape Re

mdoc sweep.

Fix typos.

PR: docs/131625
Submitted by: Andrew Wright <andrew at qemg.org>
MFC after: 1 month

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.

Add the new standard EXIT STATUS section where appropriate.
Sort standard sections in the (documented) preferred order.

Document missing multibyte character handling in utilities specified
by POSIX.

Fix a broken reference to locale(5) and point to re_format(7) too for an
explanation of `collating elements'.

mdoc(7) police: a bit of tidying.

Add a description of the restrictions that red(1) imposes to users,
and a warning that this "restricted mode" can be bypassed easily by
using symlinks, so that users don't depend too much on it.

PR: docs/35940
Submitted by: Gary W. Swearingen <swear@blarg.net>
Reviewed by: jmallett
MFC after: 1 week

Use `The .Nm utility'

mdoc(7) police: join split punctuation to macro calls.

Remove whitespace at EOL.

Correct a spelling nit (a -> an).

Remove a comment which seemed to confuse makewhatis:

ben@freefall:~$ whatis ed
ed(1), -(1) - ed, red text editor

PR: 25164
Submitted by: Rich Morin <rdm@cfcl.com>

Eliminate mdocNG warnings caused by misplaced or extraneous macro calls.

mdoc(7) police: split punctuation characters + misc fixes.

Prepare for mdoc(7)NG.

Prepare for mdoc(7)NG.

mdoc(7) police: use the new features of the Nm macro.

Properly declare the multiple-columns list.

Finish conversion from man(7) to mdoc(7).

Supply only one author name per instance of %A, as per mdoc.samples(7).

PR: 18465
Submitted by: Kazu TAKAMUNE <takamune@avrl.mei.co.jp>

Remove single-space hard sentence breaks. These degrade the quality
of the typeset output, tend to make diffs harder to read and provide
bad examples for new-comers to mdoc.

Add `.Nm red' to NAME section.

$Id$ -> $FreeBSD$

Fix use of -man macro, correct description of the behaviour of the `+n'
command to match whats there in the source.

PR: 7328

Convert to mdoc.

Ensure stdout is line buffered.
Change "pat" -> "re" in man page.

fix misspelling

Submitted-by: Josh Gilliam

Closes PR:4427

Revert $FreeBSD$ to $Id$

Make the long-awaited change from $Id$ to $FreeBSD$

This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.

delete doubled words, e.g.: "the the" -> "the"

[HISTORY] command appeared in Version 1 AT&T UNIX
Obtained from: A Quarter Century of UNIX, Peter H. Salus, page 41

Added $Id$

Fix gross spelling and typographical errors pointed out by Keith Bostic.

use umask 077 for buffer file

Fixed range address bug: 1,2, == 2,2 not 2,.
Overhauled the name space, reworked some modules and removed the
obsolescent Addison-Wesley copyright.

fixed undo within a global command (would corrupt the buffer)
changed move within a global to behave as in SunOS
added a couple error messages

POSIX ed version 0.6 by Andrew Moore (alm@netcom.com).