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 7.8p1.

Approved by: re (kib@)

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 7.2p2.

Upgrade to OpenSSH 7.0p1.

Upgrade to OpenSSH 5.6p1.

Properly flatten openssh/dist.

Merge conflicts.

MFC after: 1 week

Vendor import of OpenSSH 4.4p1.

Resolve conflicts.

Vendor import of OpenSSH 4.0p1.

Resolve conflicts.

Vendor import of OpenSSH 3.8p1.

Resolve conflicts and remove obsolete files.

Sponsored by: registrar.no

Vendor import of OpenSSH 3.7.1p2.

Remove RCSID from files which have no other diffs to the vendor branch.

Resolve conflicts.

Vendor import of OpenSSH-portable 3.5p1.

Resolve conflicts.

Sponsored by: DARPA, NAI Labs

Vendor import of OpenSSH 3.4p1.

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.

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

Backout completely canonical lookup modifications.

Add code for being compatible with ssh.com's krb5 authentication.
It is done by using the same ssh messages for v4 and v5 authentication
(since the ssh.com does not now anything about v4) and looking at the
contents after unpacking it to see if it is v4 or v5.
Based on code from Björn Grönvall <bg@sics.se>

PR: misc/20504

Update to OpenSSH 2.3.0 with FreeBSD modifications. OpenSSH 2.3.0
new features description elided in favor of checking out their
website.

Important new FreeBSD-version stuff: PAM support has been worked
in, partially from the "Unix" OpenSSH version, and a lot due to the
work of Eivind Eklend, too.

This requires at least the following in pam.conf:

sshd auth sufficient pam_skey.so
sshd auth required pam_unix.so try_first_pass
sshd session required pam_permit.so

Parts by: Eivind Eklend <eivind@FreeBSD.org>

Import of OpenSSH 2.3.0 (virgin OpenBSD source release).

Resolve conflicts and update for OpenSSH 2.2.0

Reviewed by: gshapiro, peter, green

Initial import of OpenSSH post-2.2.0 snapshot dated 2000-09-09

Make rate limiting work per-listening-socket. Log better messages than
before for this, requiring a new function (get_ipaddr()). canohost.c
receives a $FreeBSD$ line.

Suggested by: Niels Provos <niels@OpenBSD.org>

Resolve conflicts

Import from vendor repository.

Obtained from: OpenBSD

Resolve conflicts and update for FreeBSD.

Initial import of OpenSSH v2.1.

Resolve conflicts.

Virgin import of OpenSSH sources dated 2000/03/25

1) Add kerberos5 functionality.
by Daniel Kouril <kouril@informatics.muni.cz>
2) Add full LOGIN_CAP capability
by Andrey Chernov

Merge from internat.freebsd.org; move ssh files from /etc to /etc/ssh

Fix garbage in SSH_PROGRAM (only on freefall, not internat)

remove more ports crud.

Add the patches fom ports (QV: ports/security/openssh/patches/patch-*)

Vendor import of OpenSSH.

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.

Merge conflicts.

MFC after: 1 week

Vendor import of OpenSSH 4.4p1.

Resolve conflicts.

Vendor import of OpenSSH 4.0p1.

Resolve conflicts.

Vendor import of OpenSSH 3.8p1.

Resolve conflicts and remove obsolete files.

Sponsored by: registrar.no

Vendor import of OpenSSH 3.7.1p2.

Remove RCSID from files which have no other diffs to the vendor branch.

Resolve conflicts.

Vendor import of OpenSSH-portable 3.5p1.

Resolve conflicts.

Sponsored by: DARPA, NAI Labs

Vendor import of OpenSSH 3.4p1.

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.

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

Backout completely canonical lookup modifications.

Add code for being compatible with ssh.com's krb5 authentication.
It is done by using the same ssh messages for v4 and v5 authentication
(since the ssh.com does not now anything about v4) and looking at the
contents after unpacking it to see if it is v4 or v5.
Based on code from Björn Grönvall <bg@sics.se>

PR: misc/20504

Update to OpenSSH 2.3.0 with FreeBSD modifications. OpenSSH 2.3.0
new features description elided in favor of checking out their
website.

Important new FreeBSD-version stuff: PAM support has been worked
in, partially from the "Unix" OpenSSH version, and a lot due to the
work of Eivind Eklend, too.

This requires at least the following in pam.conf:

sshd auth sufficient pam_skey.so
sshd auth required pam_unix.so try_first_pass
sshd session required pam_permit.so

Parts by: Eivind Eklend <eivind@FreeBSD.org>

Import of OpenSSH 2.3.0 (virgin OpenBSD source release).

Resolve conflicts and update for OpenSSH 2.2.0

Reviewed by: gshapiro, peter, green

Initial import of OpenSSH post-2.2.0 snapshot dated 2000-09-09

Make rate limiting work per-listening-socket. Log better messages than
before for this, requiring a new function (get_ipaddr()). canohost.c
receives a $FreeBSD$ line.

Suggested by: Niels Provos <niels@OpenBSD.org>

Resolve conflicts

Import from vendor repository.

Obtained from: OpenBSD

Resolve conflicts and update for FreeBSD.

Initial import of OpenSSH v2.1.

Resolve conflicts.

Virgin import of OpenSSH sources dated 2000/03/25

1) Add kerberos5 functionality.
by Daniel Kouril <kouril@informatics.muni.cz>
2) Add full LOGIN_CAP capability
by Andrey Chernov

Merge from internat.freebsd.org; move ssh files from /etc to /etc/ssh

Fix garbage in SSH_PROGRAM (only on freefall, not internat)

remove more ports crud.

Add the patches fom ports (QV: ports/security/openssh/patches/patch-*)

Vendor import of OpenSSH.