ssl: Fix alert handling so that unexpected messages are logged and alerted correctly

... in handle_common_event(), instead of passing it to
handle_own_alert() after wrapping it in a tuple with `StateName` (i.e.
`{StateName, Msg}`).

The `StateName` is passed to handle_normal_shutdown() and to
alert_user(). The latter has a clause matching it against `connection`.
Unfortunately, when the argument was in fact `{StateName, Msg}`, another
clause was executed which dropped the `active` flag value and forced it
to `false`, even if the state was actually `connection`. It meant that
later in send_or_reply(), the alert was not propagated to the user, even
though it should (`active` set to `true` or `once`).

Now that handle_common_event() always passes the actual `StateName`, the
problem is fixed.

ERL-562

Preferably customized cipher suites will be based on the default value.
But all may be used as base and hence it will be good to
handle anonymous suites separately as they are intended for testing purposes.

Authenticated encryption (AE) and authenticated encryption with
associated data (AEAD, variant of AE) is a form of encryption which
simultaneously provides confidentiality, integrity, and authenticity
assurances on the data.

This is more logical value then null that was used, this happened to
work as the AEAD property was derived form other data, but it is confusing!

LibreSSL-2.6.3 dropped DSS (DSA) support

* ingela/ssl/test-cuddle:
  ssl: Call clean version function

Make sure tests are run with intended version settings.