starttls(8) on OpenBSD

The text 6ea8700f2733, as OpenBSD 7.7, OpenBSD 7.6, OpenBSD 7.5, OpenBSD 7.4, OpenBSD 7.3, OpenBSD 7.2, OpenBSD 7.1 shipped it.

ESMTP over TLS/SSL

starttls(8) on OpenBSD now