If the tls_level is set to a cipherset other than tls_compat, the
ssl cipherset has to get specified extra, if ssl is used.
But if the user explicitly disabled SSL, and set tls_level to anything
else than tls_compat required the user to explicitly set ssl_version,
which is contradicting.
Signed-off-by: Benedikt Heine <bebe@bebehei.de>
Signed-off-by: Nicolas Sebrecht <nicolas.s-dev@laposte.net>