ssh: update to OpenSSH v9.0p1

Release notes are available at https://www.openssh.com/txt/release-9.0

Some highlights:

* ssh(1), sshd(8): use the hybrid Streamlined NTRU Prime + x25519 key
exchange method by default ("sntrup761x25519-sha512@openssh.com").
The NTRU algorithm is believed to resist attacks enabled by future
quantum computers and is paired with the X25519 ECDH key exchange
(the previous default) as a backstop against any weaknesses in
NTRU Prime that may be discovered in the future. The combination
ensures that the hybrid exchange offers at least as good security
as the status quo.

* sftp-server(8): support the "copy-data" extension to allow server-
side copying of files/data, following the design in
draft-ietf-secsh-filexfer-extensions-00. bz2948

* sftp(1): add a "cp" command to allow the sftp client to perform
server-side file copies.

This commit excludes the scp(1) change to use the SFTP protocol by
default; that change will immediately follow.

MFC after: 1 month
Relnotes: Yes
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 7.2p2.

Now that we have mandoc, we can leave $Mdocdate$ tags as-is. Unfortunately,
there is (currently) no way to make Subversion generate correct $Mdocdate$
tags, but perhas we can teach mandoc to read Subversion's %d format.

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 5.8p2.

Upgrade to OpenSSH 5.6p1.

More commas

Our groff doesn't understand $Mdocdate$, so replace them with bare dates.

MFC after: 3 days

Upgrade to OpenSSH 5.1p1.

I have worked hard to reduce diffs against the vendor branch. One
notable change in that respect is that we no longer prefer DSA over
RSA - the reasons for doing so went away years ago. This may cause
some surprises, as ssh will warn about unknown host keys even for
hosts whose keys haven't changed.

MFC after: 6 weeks

Properly flatten openssh/dist.

Vendor import of OpenSSH 4.4p1.

Vendor import of OpenSSH 3.7.1p2.

Vendor import of OpenSSH-portable 3.6.1p1.

Vendor import of OpenSSH-portable 3.5p1.

Vendor import of OpenSSH 3.3.

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 7.2p2.

Now that we have mandoc, we can leave $Mdocdate$ tags as-is. Unfortunately,
there is (currently) no way to make Subversion generate correct $Mdocdate$
tags, but perhas we can teach mandoc to read Subversion's %d format.

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 5.8p2.

Upgrade to OpenSSH 5.6p1.

More commas

Our groff doesn't understand $Mdocdate$, so replace them with bare dates.

MFC after: 3 days

Upgrade to OpenSSH 5.1p1.

I have worked hard to reduce diffs against the vendor branch. One
notable change in that respect is that we no longer prefer DSA over
RSA - the reasons for doing so went away years ago. This may cause
some surprises, as ssh will warn about unknown host keys even for
hosts whose keys haven't changed.

MFC after: 6 weeks

Properly flatten openssh/dist.

Vendor import of OpenSSH 4.4p1.

Vendor import of OpenSSH 3.7.1p2.

Vendor import of OpenSSH-portable 3.6.1p1.

Vendor import of OpenSSH-portable 3.5p1.

Vendor import of OpenSSH 3.3.

Now that we have mandoc, we can leave $Mdocdate$ tags as-is. Unfortunately,
there is (currently) no way to make Subversion generate correct $Mdocdate$
tags, but perhas we can teach mandoc to read Subversion's %d format.

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.

Missing commas in Dd

Approved by: re (kib@)

More commas

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.

Our groff doesn't understand $Mdocdate$, so replace them with bare dates.

MFC after: 3 days

Vendor import of OpenSSH 4.4p1.

Vendor import of OpenSSH 3.7.1p2.

Vendor import of OpenSSH-portable 3.6.1p1.

Vendor import of OpenSSH-portable 3.5p1.

Vendor import of OpenSSH 3.3.