MFH (r322052): Upgrade OpenSSH to 7.5p1.

MFH (r314306,r314720): Upgrade OpenSSH to 7.4p1.

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 7.1p2.

Upgrade to OpenSSH 7.0p1.

Upgrade to OpenSSH 6.9p1.

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

One more $Mdocdate$

Upgrade to OpenSSH 6.6p1.

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Partly rewrite the upgrade instructions and remove the now outdated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.

MFV r257952:

Upgrade to OpenSSH 6.4p1.

Bump VersionAddendum.

Approved by: des

Pull in all the OpenSSH bits that we'd previously left out because we
didn't use them. This will make future merges from the vendor tree much
easier.

Approved by: re (gjb)

Vendor import of OpenSSH 6.3p1

Vendor import of OpenSSH 6.2p2.

Vendor import of OpenSSH 6.2p1.

Vendor import of OpenSSH 6.1p1.

Vendor import of OpenSSH 6.0p1.

Vendor import of OpenSSH 5.9p1

Vendor import of OpenSSH 5.8p2

Vendor import of OpenSSH 5.8p1

Vendor import of OpenSSH 5.7p1

Vendor import of OpenSSH 5.6p1

Vendor import of OpenSSH 5.5p1

Vendor import of OpenSSH 5.4p1

Vendor import of OpenSSH 5.3p1

Vendor import of OpenSSH 5.2p1

svn:eol-style is missing from these files

Since we automatically set svn:eol-style on new files (including files
added during a vendor import), set it on the entire dist tree.

Vendor import of OpenSSH 5.1p1

Vendor import of OpenSSH 5.0p1 for posterity's sake

Vendor import of OpenSSH 4.9p1 for posterity's sake

Vendor import of OpenSSH 4.7p1 for posterity's sake

Oops, remove svn:keyword again.

Vendor import of OpenSSH 4.6p1 for posterity's sake