Pull in a patchset from upstream to silence spurious "no such identity
file" warnings.
Apply a patch from OpenSSH bugzilla #2057 to silence "received disconnect"
errors in the common case (i.e. client intentionally disconnected).
The previous commit missed part of the patch.  Re-apply.
Vendor import of OpenSSH 6.2p2.
Apply upstream revision 1.151 (fix relative symlinks)
Revert r255420. This seems to break some Powermac systems and will be
revisited much later.

Pointy hat to:		me
Approved by:		re (kib, implicit due to breakage 10 minutes ago)
These three files appeared in 6.0p1, which was imported into the vendor
branch but never merged to head.  They were inadvertantly left out when
6.1p1 was merged to head.  It didn't make any difference at the time,
because they were unused, but one of them is required for DNS-based host
key verification.

Approved by:	re (blanket)