ssh: drop $FreeBSD$ from crypto/openssh

After we moved to git $FreeBSD$ is no longer expanded and serves no
purpose. Remove them from OpenSSH to reduce diffs against upstream.

Sponsored by: The FreeBSD Foundation

openssh: update to OpenSSH v8.7p1

Some notable changes, from upstream's release notes:

- sshd(8): Remove support for obsolete "host/port" syntax.
- ssh(1): When prompting whether to record a new host key, accept the key
fingerprint as a synonym for "yes".
- ssh-keygen(1): when acting as a CA and signing certificates with an RSA
key, default to using the rsa-sha2-512 signature algorithm.
- ssh(1), sshd(8), ssh-keygen(1): this release removes the "ssh-rsa"
(RSA/SHA1) algorithm from those accepted for certificate signatures.
- ssh-sk-helper(8): this is a new binary. It is used by the FIDO/U2F
support to provide address-space isolation for token middleware
libraries (including the internal one).
- ssh(1): this release enables UpdateHostkeys by default subject to some
conservative preconditions.
- scp(1): this release changes the behaviour of remote to remote copies
(e.g. "scp host-a:/path host-b:") to transfer through the local host
by default.
- scp(1): experimental support for transfers using the SFTP protocol as
a replacement for the venerable SCP/RCP protocol that it has
traditionally used.

Additional integration work is needed to support FIDO/U2F in the base
system.

Deprecation Notice
------------------

OpenSSH will disable the ssh-rsa signature scheme by default in the
next release.

Reviewed by: imp
MFC after: 1 month
Relnotes: Yes
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D29985

Upgrade to OpenSSH 7.7p1.

Upgrade to OpenSSH 7.6p1. This will be followed shortly by 7.7p1.

This completely removes client-side support for the SSH 1 protocol,
which was already disabled in 12 but is still enabled in 11. For that
reason, we will not be able to merge 7.6p1 or newer back to 11.

Upgrade to OpenSSH 7.5p1.

Upgrade to OpenSSH 7.3p1.

r291198 inadvertantly reverted a local patch for the default location
of ssh-askpass and xauth, breaking X11 forwarding.

Retire the NONE cipher option.

Add a pre-merge script which reverts mechanical changes such as added
$FreeBSD$ tags and man page dates.

Add a post-merge script which reapplies these changes.

Run both scripts to normalize the existing code base. As a result, many
files which should have had $FreeBSD$ tags but didn't now have them.

Partly rewrite the upgrade instructions and remove the now outdated
list of tricks.

Upgrade to OpenSSH 6.5p1.

Upgrade to 6.3p1.

Approved by: re (gjb)

Upgrade to OpenSSH 5.9p1.

MFC after: 3 months

Upgrade to OpenSSH 5.8p2.

Upgrade to OpenSSH 5.4p1.

MFC after: 1 month

Upgrade to OpenSSH 5.2p1.

MFC after: 3 months

Properly flatten openssh/dist.

s/X11R6/local/g

Merge conflicts.

MFC after: 1 week

Vendor import of OpenSSH 4.4p1.

Resolve conflicts

Vendor import of OpenSSH 3.9p1.

Resolve conflicts.

Vendor import of OpenSSH 3.8p1.

Forcibly revert to mainline.

Vendor import of OpenSSH 3.3p1.

Resolve conflicts. Known issues:

- sshd fails to set TERM correctly.
- privilege separation may break PAM and is currently turned off.
- man pages have not yet been updated

I will have these issues resolved, and privilege separation turned on by
default, in time for DP2.

Sponsored by: DARPA, NAI Labs

Vendor import of OpenSSH 3.3.

Remove _PATH_CP now that it is defined in paths.h

Reviewed by: des

Fix conflicts.

Vendor import of OpenSSH 3.1

Fix conflicts for OpenSSH 2.9.

Say "hi" to the latest in the OpenSSH series, version 2.9!

Happy birthday to: rwatson

r291198 inadvertantly reverted a local patch for the default location
of ssh-askpass and xauth, breaking X11 forwarding.

Retire the NONE cipher option.

Add a pre-merge script which reverts mechanical changes such as added
$FreeBSD$ tags and man page dates.

Add a post-merge script which reapplies these changes.

Run both scripts to normalize the existing code base. As a result, many
files which should have had $FreeBSD$ tags but didn't now have them.

Partly rewrite the upgrade instructions and remove the now outdated
list of tricks.

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

MFH OpenSSH 5.4p1

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.

s/X11R6/local/g

Merge conflicts.

MFC after: 1 week

Vendor import of OpenSSH 4.4p1.

Resolve conflicts

Vendor import of OpenSSH 3.9p1.

Resolve conflicts.

Vendor import of OpenSSH 3.8p1.

Forcibly revert to mainline.

Vendor import of OpenSSH 3.3p1.

Resolve conflicts. Known issues:

- sshd fails to set TERM correctly.
- privilege separation may break PAM and is currently turned off.
- man pages have not yet been updated

I will have these issues resolved, and privilege separation turned on by
default, in time for DP2.

Sponsored by: DARPA, NAI Labs

Vendor import of OpenSSH 3.3.

Remove _PATH_CP now that it is defined in paths.h

Reviewed by: des

Fix conflicts.

Vendor import of OpenSSH 3.1

Fix conflicts for OpenSSH 2.9.

Say "hi" to the latest in the OpenSSH series, version 2.9!

Happy birthday to: rwatson