openssh: Update to 9.9p2

This release exists primarily to fix two security bugs. The fixes have
been independently imported into FreeBSD. This import serves to update
the ssh and sshd version number.

A few minor bug fixes are also included; see the upstream release notes
for full details of the 9.9p2 release
(https://www.openssh.com/releasenotes.html).

Sponsored by: The FreeBSD Foundation

(cherry picked from commit 0ae642c7dd0c2cfd965a22bf73876cd26cceadd2)

Approved by: re (accelerated MFC)

(cherry picked from commit 059b786b7db55b776d82748842f4d6d89cb79664)
(cherry picked from commit a8c1ea2614a43922dff9598c7948df32473c720c)

Approved by: re (cperciva)