Sorted some of the pending OpenSSH bugs into fix for 3.8.1p1 and aim for the next major release.

For the past couple of releases, we've opened a "Release Engineering" bug to tie all of the pending fixes shortly before the release, to make sure stuff didn't get missed. I found myself sorting bugs into "fix now" and "fix later", so I decided to start tracking the "fix later" ones too. There's no guarantee that the listed ones will be done, but it should give folks a rough idea what the plan is.