openssl/gtlsclientconnection: adapt to OpenSSL 1.1.0+
openssl/gtlsclientconnection: adapt to OpenSSL 1.1.0+

Signed-off-by: Igor Gnatenko <71fb2d16c26f553767b965fdac40e83622cad277@src.gnome.org>

GNOME/glib-networking,GNOME/glib-networking,GNOME/glib-networking