reminder about our stable branches

[Damien Miller]

Hi,

This is a semi-periodic reminder that we sometime check in small but
signficant fixes to the current release's stable branch. For example,
the current release has already accrued a few small fixes:

https://anongit.mindrot.org/openssh.git/log/?h=V_9_9

If you maintain OpenSSH for an organisation or downstream distribution,
we recommend tracking fixes on these branches.

The fixes that land on these branches have been portability and
reliability fixes only. We'd almost certainly do a full release for
any significant security problem.

-d