openssh: sync update document with main

(cherry picked from commit 4c3ccd967e6b9a6c157bd38410bdccd098bdb9e1)
(cherry picked from commit e491358c94b67d10df1dc31929661e5948162de0)
(cherry picked from commit 9fcda2f48d1c362e097f553e97d3739c484b09a9)
(cherry picked from commit 99b201c331fb1def2df61a4e1aa6162f5b94453a)
(cherry picked from commit 74c59ab790db0062b768bb9742e4d1ad036501ad)
(cherry picked from commit 14da1cc7ad76d7ff21e38dfd7ea288d0fea62410)
(cherry picked from commit 519496a5985549d2935cf296a709b1e726b1b5e5)
(cherry picked from commit 576b477ba41c9916fae3a83e6b4dd98c682a0c2f)
(cherry picked from commit 35a034250896584a63204f60fa57e6eddca049ac)
(cherry picked from commit f3fd88507489f6b80402ab7a0fb195ca9c708334)
(cherry picked from commit b645ee1815daf96ee9512633b55c423bc897b244)
(cherry picked from commit 438fd19dc327400e5fbcebfcb9fe9361b317e791)
(cherry picked from commit e3c87ef0194d82a22af69cebdc24771ffc3b366b)