MFH (r314527,r314576,r314601,r317998): Upgrade OpenSSH to 7.3p1.

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Upgrade to OpenSSH 7.2p2.

Upgrade to OpenSSH 7.0p1.

begone, foul autoprops!

Upgrade to OpenSSH 6.8p1.

Upgrade to OpenSSH 6.7p1, retaining libwrap support (which has been removed
upstream) and a number of security fixes which we had already backported.

MFC after: 1 week

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Partly rewrite the upgrade instructions and remove the now outdated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 6.2p1. The most important new features are support
for a key revocation list and more fine-grained authentication control.

Upgrade OpenSSH to 6.1p1.

Upgrade to OpenSSH 5.8p2.

Missing commas

Upgrade to OpenSSH 5.4p1.

MFC after: 1 month

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

Remove svn:keywords except on files that need it. This makes diffs
against the vendor branch much more readable.

Consistently set svn:eol-style.

This commit was generated by cvs2svn to compensate for changes in r162852,
which included commits to RCS files with non-trunk default branches.

Vendor import of OpenSSH 4.4p1.

Vendor import of OpenSSH 4.3p1.

Vendor import of OpenSSH 4.0p1.

Vendor import of OpenSSH 3.9p1.

Vendor import of OpenSSH 3.8.1p1.

Vendor import of OpenSSH 3.8p1.

Vendor import of OpenSSH 3.7.1p2.

Vendor import of OpenSSH-portable 3.6.1p1.

Vendor import of OpenSSH 3.4p1.

Vendor import of OpenSSH 3.3.

Vendor import of OpenSSH 3.1

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

Happy birthday to: rwatson

Import of OpenSSH 2.3.0 (virgin OpenBSD source release).

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

Initial import of OpenSSH v2.1.

Virgin import of OpenSSH sources dated 2000/03/25

Vendor import of OpenSSH.