openssh: refer to OpenSSL not SSLeay

This change was made upstream between 7.9p1 and 8.0p1. We've made local
changes in the same places for handling the version_addendum; apply the
SSLeay_version to OpenSSL_version change in advance of importing 8.0p1.

Obtained from: OpenSSH-portable a65784c9f9c5
Sponsored by: The FreeBSD Foundation

(cherry picked from commit 6471c6bd75af57acde7dc39f5202d9a7adf4130a)

openssh: refer to OpenSSL not SSLeay, part 2

(cherry picked from commit ea64ebd08c80e4c0a7b8ed207caba45e9374908e)